[native] Blocking navigation in edit mode in OverlayRouter

Summary:
When we are in edit mode and the user made changes, we prevent him in this diff from opening modals i.g.:

• opening images,
• opening tooltips.

Test Plan:

• Enter edit mode,
• Open the modal without making changes.
• Enter edit mode and make changes to the message,
• Open modal - should confirm with alert.
• Check if the draft is restored.

• Do the same in sidebar.

Video:

Reviewers: michal, inka, ashoat, tomek

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D8270