Dirty indicator is still shown for the css file in the working set even after all changes made in an inline editor are undone.

[RaymondLim]

1. Open an inline editor.
2. Make some changes like inserting some empty lines and then undo it.

Result: The external css file is open in the working set with the dirty indicator before its file name. The indicator should be removed after all changes are undone.

[gruehle]

This is a known issue, and is being tracked as a backlog story. The dirty indicator does not go away when undoing back to the "clean" state of the document. This is true for all file types, not just CSS.