Your comments

Alexander,

if U plan update app behavior for close, please allow "silent" close without annoying: Do U want to save file ?

it is UI killer. Best is not to ask, silent close and retain file for next open and let user decide what to do with unsaved files.

and

yes I noted the supertiny sidebar but I can't find a way to extend it now :(, it is jammed

hello Alexander, thank you for fast response, here is video with my prob