This is a very minor one, but currently if you create a Style, and then undo the Style creation, an Element will still show Orange Properties until the Element is unselected and re-selected.

Repro Steps:

1) Create a Project with a MainPage.xaml
2) Introduce a Button to the Page.
3) Right-Click on the Button, and from the context menu, select 'Style', 'Button', then 'Create', and confirm a storage location.
This will open the Button in its Style Dummy Editor.
4) Exit the Dummy Editor by pressing the 'Exit Scope' button in the lower-left of the window.

5) Select the Button on the Stage.
Observe how it has Orange Property fields.

6) With the Button still selected, Press Ctrl+Z once.
This will remove the Style from being created.

Observe despite the Style being removed via undo, that the Properties are still showing Orange on the Button.

7) Deselect the Button, then Re-Select it.
Observe how the Orange Properties are now no longer present.

Expected Result: The Properties Panel always accurately reflects the state of the Elements on-Stage