Track all context action invocations, not just those from NRefactory.

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/CSharpContextActionWrapper.cs

@@ -54,7 +54,6 @@ namespace CSharpBinding.Refactoring
 		
 		public void Execute(EditorRefactoringContext context)
 		{
-			SD.AnalyticsMonitor.TrackFeature(provider.ID);
 			var resolver = context.GetAstResolverAsync().Result;
 			var refactoringContext = new SDRefactoringContext(context.Editor, resolver, context.CaretLocation);
 			var action = getUpdatedCodeAction(refactoringContext);

src/Main/Base/Project/Editor/ContextActions/ContextActionViewModel.cs

@@ -86,6 +86,8 @@ namespace ICSharpCode.SharpDevelop.Editor.ContextActions
 		
 		public void Execute(object parameter)
 		{
+			if (action.Provider != null)
+				SD.AnalyticsMonitor.TrackFeature(action.Provider.ID);
 			this.action.Execute(context);
 		}
 		

src/Main/Base/Project/Refactoring/ContextAction.cs

@@ -12,7 +12,7 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 {
 	/// <summary>
 	/// Base class for implementing one context action.
-	/// Useful for implementing <see cref="IContextActionsProvider" /> that provides just one action - common scenario.
+	/// Useful for implementing <see cref="IContextActionProvider" /> that provides just one action - common scenario.
 	/// </summary>
 	public abstract class ContextAction : IContextActionProvider, IContextAction
 	{