Tweak the implementation

Author: Hosch250

RetailCoder.VBE/UI/Command/ShowParserErrorsCommand.cs

@@ -36,14 +36,9 @@ public ShowParserErrorsCommand(VBE vbe, INavigateCommand navigateCommand, Rubber
 
         private void _state_StateChanged(object sender, ParserStateEventArgs e)
         {
-            if (_state.Status != ParserState.Error && _state.Status != ParserState.Parsed) { return; }
-
             if (_viewModel == null) { return; }
 
-            if (_viewModel.Tabs.All(tab => tab.Header != RubberduckUI.Parser_ParserError))
-            {
-                return;
-            }
+            if (_state.Status != ParserState.Error && _state.Status != ParserState.Parsed) { return; }
 
             UiDispatcher.InvokeAsync(UpdateTab);
         }
@@ -76,8 +71,6 @@ public override void Execute(object parameter)
                 return;
             }
 
-            UpdateTab();
-
             try
             {
                 var presenter = _presenterService.Presenter(_viewModel);