Always return available for SyncClassView command

src/VisualStudio/Core/Def/Implementation/Library/ClassView/AbstractSyncClassViewCommandHandler.cs

@@ -116,7 +116,7 @@ public bool ExecuteCommand(SyncClassViewCommandArgs args, CommandExecutionContex
 
         public CommandState GetCommandState(SyncClassViewCommandArgs args)
         {
-            return Commanding.CommandState.Unspecified;
+            return Commanding.CommandState.Available;
         }
     }
 }