Dim the shared screen tab's icon when it is inactive (#14678)

This PR makes it so the icon of the shared screen tab is properly dimmed
when the tab is inactive.

Release Notes:

- Fixed an issue where the shared screen tab's icon would not render as
dimmed when the tab was inactive.
5a090bc3f3Marshall Bowers committed on 7/17/2024, 7:25:56 PM· committed by GitHubparent4852e17
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