Currently, it is possible to perform an action which induces a XAML error warning.

However, performing the 'Undo' action after this happens, can result in the bad XAML being fixed, but the XAML error in Studio still persisting.

Repro Steps:

Repro Steps:

1) Open the Stratus Project from the InternalProjects GitHub, and open Scene.xaml
2) Navigate to the Triggers Panel (Ctrl+3)
3) Select any Trigger from the list, and in its Properties Panel, select any of the added Actions, and give it a name already in-use by another of the other Trigger Actions present in its list.

Observe how a XAML error is produced.

4) Undo the Trigger Action rename by pressing Ctrl+Z.

Observe how the change has been undone, but the Page's Tab continues to show as red, with the red cross xaml error notification persisting in the lower-right of the Stage.

5) Save, then close and re-open the Page

Observe how the XAML error notifications have disappeared.

Expected Results: If the change causing the XAML error has been undone and no more error exists in the xaml, the xaml error notifications should cease to display in Studio.