feat: Add support for displaying contextual menus on icons #9581
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The basics
The details
Resolves
Fixes #3568
Proposed Changes
This PR builds on #9580 (it will be rebased once that is merged) to allow icons to display contextual menus. This can be done by simply overriding/implementing
showContextMenu()on anIIconto show a contextual menu with the desired options. By default, icons defer to their parent block's contextual menu, which matches the current behavior when one right clicks on an icon.