marketplace toc and repos toc changes. (#2925)

* marketplace toc and repos toc changes.
AB#1788546: Get Started with the Marketplace

* build fix

* AB#1788546: Get Started with the Marketplace

* updates to Develop extensions TOC

* AB#1788547: Get Started developing extensions

* fix build warnings

* further refinements to toc

* table format fix

* 2nd level refinements

* finishing up

* editorial fix

* format change

* fix broken link

docs/boards/get-started/manage-boards.md

@@ -114,7 +114,7 @@ If users believe they're getting too many notifications, they can [opt out of a
 
 ## Install and manage extensions 
 
-To add new features and capabilities to Azure Boards, install extensions from the [Azure DevOps Marketplace](https://marketplace.visualstudio.com/azuredevops). You can install [free, preview, or paid](../../marketplace/faq-extensions.md#difference) 
+To add new features and capabilities to Azure Boards, install extensions from the [Azure DevOps Marketplace](https://marketplace.visualstudio.com/azuredevops). You can install [free, preview, or paid](../../marketplace/faq-extensions.yml) 
 
 To learn more, see [Install free extensions for Azure DevOps](../../marketplace/install-extension.md). To learn about building your own Azure DevOps extensions, see [developing](../../extend/overview.md) and [publishing](../../extend/publish/overview.md) extensions.
 

docs/extend/develop/add-query-result-tabs.md

@@ -19,7 +19,7 @@ ms.date: 05/15/2018
 If you have a web page that can be hosted in an iframe, it can be hosted in Azure DevOps as a tab on the query result pages.
 In this example, we'll add a simple Hello World tab on query results.
 
-![Tab location on the Azure DevOps Query Results](/previous-versions/azure/devops/docs/extend/reference/targets/vss/work/web/media/queryResultsPivotTab.png)
+![Tab location on the Azure DevOps Query Results.](media/query-results-pivot-tab.png)
 
 ## Create your web page
 

docs/extend/develop/web-navigation.md

@@ -1,4 +1,4 @@
----
+---
 ms.technology: devops-ecosystem
 title: Developing extensions for vertical web navigation
 description: Guidance for developing extensions to be used with vertical web navigation
@@ -10,7 +10,7 @@ author: apawast
 ms.date: 10/02/2019
 ---
 
-# Guidance for extension developers impacted by vertical navigation
+# Vertical navigation guidance
 
 [!INCLUDE [version-vsts-only](../../includes/version-vsts-only.md)]
 

docs/extend/toc.yml

@@ -1,9 +1,9 @@
-- name: What are extensions?
-  href: ./overview.md
-- name: Develop a web extension
-  href: get-started/node.md
-- name: Tutorials
+- name:  Get started
   items:
+  - name: Develop a web extension
+    href: get-started/node.md
+  - name: Contribution model
+    href: develop/contributions-overview.md
   - name: Create a custom pipelines task
     href: develop/add-build-task.md
   - name: Author a pipeline decorator
@@ -12,68 +12,62 @@
   items:
   - name: Extension samples
     href: develop/samples-overview.md
-- name: Concepts
-  items:
-  - name: Contribution model
-    href: develop/contributions-overview.md
-- name: How-to guides
-  items:
-  - name: Develop
+  - name: Vertical navigation guidance
+    href: develop/web-navigation.md
+  - name: Work with URLs
+    href: develop/work-with-urls.md 
+  - name: Store data and settings
+    href: develop/data-storage.md 
+  - name: Add a hub
+    href: develop/add-hub.md
+  - name: Add a hub group
+    href: develop/add-hub-group.md
+  - name: Add a menu action
+    href: develop/add-action.md
+  - name: Add a new service endpoint
+    href: develop/service-endpoints.md
+  - name: Add a service hook
+    href: develop/add-service-hook.md
+  - name: Create a PR status server
+    href: ../repos/git/create-pr-status-server.md?toc=/azure/devops/marketplace-extensibility/toc.json&bc=/azure/devops/marketplace-extensibility/breadcrumb/toc.json
+  - name: Use Azure Functions to create custom branch policies
+    href: ../repos/git/create-pr-status-server-with-azure-functions.md?toc=/azure/devops/marketplace-extensibility/toc.json&bc=/azure/devops/marketplace-extensibility/breadcrumb/toc.json
+  - name: Add Azure Boards extensions
+    items:
+    - name: Add a tab to a Backlog  
+      href: develop/add-backlog-tabs.md
+    - name: Add a panel to a Backlog  
+      href: develop/add-backlog-panel.md
+    - name: Extend the work item form
+      href: develop/add-workitem-extension.md
+    - name: Add a custom control to a work item form
+      href: develop/custom-control.md
+    - name: Configure work item form extensions (on-premises) 
+      href: develop/configure-workitemform-extensions.md
+    - name: Add query result tabs
+      href: develop/add-query-result-tabs.md
+  - name: Add dashboard extensions
     items:
-    - name: Add a hub
-      href: develop/add-hub.md
-    - name: Add a hub group
-      href: develop/add-hub-group.md
-    - name: Add a menu action
-      href: develop/add-action.md
     - name: Add a dashboard widget
       href: develop/add-dashboard-widget.md
-    - name: Add a new service endpoint
-      href: develop/service-endpoints.md
-    - name: Add a service hook
-      href: develop/add-service-hook.md
-    - name: Create a PR status server
-      href: ../repos/git/create-pr-status-server.md?toc=/azure/devops/marketplace-extensibility/toc.json&bc=/azure/devops/marketplace-extensibility/breadcrumb/toc.json
-    - name: Use Azure Functions to create custom branch policies
-      href: ../repos/git/create-pr-status-server-with-azure-functions.md?toc=/azure/devops/marketplace-extensibility/toc.json&bc=/azure/devops/marketplace-extensibility/breadcrumb/toc.json
     - name: Add a chart
       href: develop/add-chart.md
-    - name: Store data and settings
-      href: develop/data-storage.md
-    - name: Add Work hub extensions
-      items:
-      - name: Add backlog tabs
-        href: develop/add-backlog-tabs.md
-      - name: Add backlog panels
-        href: develop/add-backlog-panel.md
-      - name: Extend the work item form
-        href: develop/add-workitem-extension.md
-      - name: Add a custom control to the work item form
-        href: develop/custom-control.md
-      - name: Configure work item form extensions in TFS
-        href: develop/configure-workitemform-extensions.md
-      - name: Add query result tabs
-        href: develop/add-query-result-tabs.md
-    - name: Call a REST API
-      href: develop/call-rest-api.md
-    - name: Extensions for public projects
-      href: develop/public-project.md
-    - name: Use vertical navigation
-      href: develop/web-navigation.md
-    - name: Work with URLs
-      href: develop/work-with-urls.md      
-  - name: Package and publish
-    items:
-    - name: Package and publish extensions
-      href: publish/overview.md
-    - name: Package and publish integrations
-      href: publish/integration.md
-    - name: Make listing public and Top Publisher program
-      href: publish/publicize.md
-    - name: Publish via command line
-      href: publish/command-line.md
-    - name: Respond to Marketplace reviews
-      href: publish/manage-ratings-reviews.md
+  - name: Call a REST API
+    href: develop/call-rest-api.md
+  - name: Public project extensions
+    href: develop/public-project.md
+- name: Package and publish
+  items:
+  - name: Package and publish extensions
+    href: publish/overview.md
+  - name: Package and publish integrations
+    href: publish/integration.md
+  - name: Make listing public and Top Publisher program
+    href: publish/publicize.md
+  - name: Publish via command line
+    href: publish/command-line.md
+  - name: Respond to Marketplace reviews
+    href: publish/manage-ratings-reviews.md
 - name: Reference
   items:
   - name: Manifest reference
@@ -92,7 +86,5 @@
     href: develop/host-navigation.md
   - name: Basic styles for widgets
     href: develop/styles-from-widget-sdk.md
-  - name: Auth and security
-    href: develop/auth.md
   - name: Deploy web content to Azure
     href: publish/publish-azure.md

docs/integrate/concepts/cross-origin-resource-sharing.md

@@ -1,4 +1,4 @@
----
+---
 title: Cross-origin resource sharing (CORS) with Azure DevOps REST APIs
 description: Learn about using CORS with Azure DevOps REST APIs
 ms.assetid: d7e3c119-5678-40e6-9c11-55a57c171278
@@ -14,7 +14,7 @@ ms.date: 08/04/2016
 
 [!INCLUDE [version-all](../../includes/version-vsts-only.md)]
 
-Azure DevOps supports CORS. This enables JavaScript code served from a domain other than `dev.azure.com/*` to make Ajax requests to Azure DevOps Services REST APIs. For this to work, each request must provide credentials (personal access tokens and OAuth access tokens are both supported options). Example:
+Azure DevOps supports cross-origin resource sharing (CORS). CORS enables JavaScript code served from a domain other than `dev.azure.com/*` to make Ajax requests to Azure DevOps Services REST APIs. For this to work, each request must provide credentials (personal access tokens and OAuth access tokens are both supported options). Example:
 
 ```js
     $( document ).ready(function() {