Merge pull request #10238 from mendix/qt-preferencesupdate

Add Extension Development Mode option

Author: quinntracy

content/en/docs/refguide/modeling/menus/edit-menu/preferences-dialog.md

@@ -281,6 +281,10 @@ When the **Show feedback survey periodically** setting is enabled, Studio Pro wi
 
 When the **Do not show antivirus exclusion notifications** setting is enabled, Studio Pro will not display notifications related to antivirus exclusions. For more information, see [Antivirus Exclusion](/refguide/antivirus-exclusion/).
 
+### Extension Development 
+
+When **Extension Development** mode is enabled, you can start Studio Pro without using the extensibility feature flag, which allows you to develop extensions for Studio Pro. You must restart Studio Pro to use this feature.
+
 ## New Features Tab {#new-features}
 
 ### App Explorer