[native] Don’t display edit mode when user changes thread

Summary: When user enters the sidebar the editing box should not be visible anymore.

Test Plan: Run the app. Enter edit mode. Enter sidebar. The box and highlight is not visible.

Reviewers: ashoat, inka, michal

Reviewed By: ashoat

Subscribers: tomek, atul

Differential Revision: https://phab.comm.dev/D7792