Merge remote-tracking branch 'origin/v13/dev' into v14/dev

# Conflicts:
#	src/Umbraco.Cms.StaticAssets/umbraco/UmbracoBackOffice/Default.cshtml
#	tests/Umbraco.Tests.AcceptanceTest/tests/DefaultConfig/Login/login.spec.ts

src/Umbraco.Core/Configuration/Models/RichTextEditorSettings.cs

@@ -146,6 +146,11 @@ public class RichTextEditorSettings
     [DefaultValue(StaticInvalidElements)]
     public string InvalidElements { get; set; } = StaticInvalidElements;
 
+    /// <summary>
+    ///     Cloud API Key for TinyMCE. This is required to use TinyMCE premium plugins.
+    /// </summary>
+    public string? CloudApiKey { get; set; }
+
     public class RichTextEditorCommand
     {
         [Required]