Undo (CTRL + Z) does not work when designing a layout

[Shreshth-mehra]

This would be greatly useful since there are so many bugs. For example, I tried adding a linked note but every time I try to select the note the view goes blank https://github.com/Make-md/makemd/issues/282#issuecomment-1975020712. Now I can't remove it from my layout because I can't set the properties for the linked note and can't even undo