## Renderer should handle nested editables [FF] ckeditor5#721 ### TC1 1. Put the caret in the first paragraph and type something. 1. Put the caret inside the widget (in "bar"). 1. Click "Undo" or press Ctrl+Z (check both). **Expected**: No error in the console. ### TC2 Try the same TC as above but use both nested editables. See if the focus is correctly moved between them.