Merge remote-tracking branch 'origin/v8/dev' into v9/feature/merge_v8_03-11-2021

# Conflicts:
#	src/Umbraco.Core/Configuration/GlobalSettings.cs
#	src/Umbraco.Core/Configuration/IGlobalSettings.cs
#	src/Umbraco.Core/Constants-AppSettings.cs
#	src/Umbraco.Tests/Umbraco.Tests.csproj
#	src/Umbraco.Web.BackOffice/Controllers/BackOfficeServerVariables.cs
#	src/Umbraco.Web.UI/umbraco/config/lang/en.xml
#	src/Umbraco.Web.UI/umbraco/config/lang/en_us.xml
#	src/Umbraco.Web.UI/web.Template.config
#	src/Umbraco.Web/Editors/ContentTypeController.cs
#	src/Umbraco.Web/HealthCheck/Checks/Security/BaseHttpHeaderCheck.cs
#	tests/Umbraco.Tests.UnitTests/Umbraco.Core/Configurations/LanguageXmlTests.cs

build/templates/UmbracoProject/appsettings.json

@@ -17,6 +17,7 @@
     "CMS": {
       //#if (HasNoNodesViewPath || UseHttpsRedirect)
       "Global": {
+        "SanitizeTinyMce": true,
         //#if (!HasNoNodesViewPath && UseHttpsRedirect)
         "UseHttps": true
         //#elseif (UseHttpsRedirect)
@@ -25,6 +26,7 @@
         //#if (HasNoNodesViewPath)
         "NoNodesViewPath": "NO_NODES_VIEW_PATH_FROM_TEMPLATE"
         //#endif
+       
       },
       //#endif
       "Hosting": {