Right align the "Settings" menu item in overflow-menu (go-gitea#30764)

I guess there could be enough people liking to make the Settings menu
item right aligned. As a site admin, I found it's easier to find the
right-aligned Settings menu item.

Tested with various sizes:

![image](https://github.com/go-gitea/gitea/assets/2114189/92836527-2cb2-4531-9296-233c5bd698f4)

![image](https://github.com/go-gitea/gitea/assets/2114189/3a0729fc-5e33-44b5-9fb4-3a4e787405b5)

![image](https://github.com/go-gitea/gitea/assets/2114189/9845ab6b-88e3-4e5a-8d6d-2b8af259d593)

Author: wxiaoguang

templates/org/menu.tmpl

@@ -40,8 +40,9 @@
 			</a>
 			{{end}}
 			{{if .IsOrganizationOwner}}
+			<span class="item-flex-space"></span>
 			<a class="{{if .PageIsOrgSettings}}active {{end}}item" href="{{.OrgLink}}/settings">
-			{{svg "octicon-tools"}} {{ctx.Locale.Tr "repo.settings"}}
+				{{svg "octicon-tools"}} {{ctx.Locale.Tr "repo.settings"}}
 			</a>
 			{{end}}
 		</div>

templates/repo/header.tmpl

@@ -216,6 +216,7 @@
 				{{template "custom/extra_tabs" .}}
 
 				{{if .Permission.IsAdmin}}
+					<span class="item-flex-space"></span>
 					<a class="{{if .PageIsRepoSettings}}active {{end}} item" href="{{.RepoLink}}/settings">
 						{{svg "octicon-tools"}} {{ctx.Locale.Tr "repo.settings"}}
 					</a>

web_src/css/base.css

@@ -938,6 +938,23 @@ overflow-menu .overflow-menu-items .item {
   margin-bottom: 0 !important; /* reset fomantic's margin, because the active menu has special bottom border */
 }
 
+overflow-menu .overflow-menu-items .item-flex-space {
+  flex: 1;
+}
+
+overflow-menu .overflow-menu-button {
+  background: transparent;
+  border: none;
+  color: inherit;
+  text-align: center;
+  width: 32px;
+  padding: 0;
+}
+
+overflow-menu .overflow-menu-button:hover {
+  color: var(--color-text-dark);
+}
+
 overflow-menu .ui.label {
   margin-left: 7px !important; /* save some space */
 }

web_src/css/modules/container.css

@@ -6,38 +6,6 @@
   max-width: 100%;
 }
 
-@media (max-width: 767.98px) {
-  .ui.ui.ui.container:not(.fluid) {
-    width: auto;
-    margin-left: 1em;
-    margin-right: 1em;
-  }
-}
-
-@media (min-width: 768px) and (max-width: 991.98px) {
-  .ui.ui.ui.container:not(.fluid) {
-    width: 723px;
-    margin-left: auto;
-    margin-right: auto;
-  }
-}
-
-@media (min-width: 992px) and (max-width: 1199.98px) {
-  .ui.ui.ui.container:not(.fluid) {
-    width: 933px;
-    margin-left: auto;
-    margin-right: auto;
-  }
-}
-
-@media (min-width: 1200px) {
-  .ui.ui.ui.container:not(.fluid) {
-    width: 1127px;
-    margin-left: auto;
-    margin-right: auto;
-  }
-}
-
 .ui.fluid.container {
   width: 100%;
 }

web_src/js/webcomponents/overflow-menu.js

@@ -8,7 +8,7 @@ window.customElements.define('overflow-menu', class extends HTMLElement {
     if (!this.tippyContent) {
       const div = document.createElement('div');
       div.classList.add('tippy-target');
-      div.tabIndex = '-1'; // for initial focus, programmatic focus only
+      div.tabIndex = -1; // for initial focus, programmatic focus only
       div.addEventListener('keydown', (e) => {
         if (e.key === 'Tab') {
           const items = this.tippyContent.querySelectorAll('[role="menuitem"]');
@@ -60,21 +60,35 @@ window.customElements.define('overflow-menu', class extends HTMLElement {
       this.tippyContent = div;
     }
 
+    const itemFlexSpace = this.menuItemsEl.querySelector('.item-flex-space');
+
     // move items in tippy back into the menu items for subsequent measurement
     for (const item of this.tippyItems || []) {
-      this.menuItemsEl.append(item);
+      if (!itemFlexSpace || item.getAttribute('data-after-flex-space')) {
+        this.menuItemsEl.append(item);
+      } else {
+        itemFlexSpace.insertAdjacentElement('beforebegin', item);
+      }
     }
 
     // measure which items are partially outside the element and move them into the button menu
+    itemFlexSpace?.style.setProperty('display', 'none', 'important');
     this.tippyItems = [];
     const menuRight = this.offsetLeft + this.offsetWidth;
-    const menuItems = this.menuItemsEl.querySelectorAll('.item');
+    const menuItems = this.menuItemsEl.querySelectorAll('.item, .item-flex-space');
+    let afterFlexSpace = false;
     for (const item of menuItems) {
+      if (item.classList.contains('item-flex-space')) {
+        afterFlexSpace = true;
+        continue;
+      }
+      if (afterFlexSpace) item.setAttribute('data-after-flex-space', 'true');
       const itemRight = item.offsetLeft + item.offsetWidth;
-      if (menuRight - itemRight < 38) { // roughly the width of .overflow-menu-button
+      if (menuRight - itemRight < 38) { // roughly the width of .overflow-menu-button with some extra space
         this.tippyItems.push(item);
       }
     }
+    itemFlexSpace?.style.removeProperty('display');
 
     // if there are no overflown items, remove any previously created button
     if (!this.tippyItems?.length) {
@@ -105,7 +119,7 @@ window.customElements.define('overflow-menu', class extends HTMLElement {
 
     // create button initially
     const btn = document.createElement('button');
-    btn.classList.add('overflow-menu-button', 'btn', 'tw-px-2', 'hover:tw-text-text-dark');
+    btn.classList.add('overflow-menu-button');
     btn.setAttribute('aria-label', window.config.i18n.more_items);
     btn.innerHTML = octiconKebabHorizontal;
     this.append(btn);