* fix: hide the toolbar when all selected content is empty
* test: hide the toolbar when all selected content is empty
* Revert "fix: ignore backspace on empty table cells to avoid editor crash (#964)"
This reverts commit 09f4b17e2e.
currently only its possible to convert single line to bullet or
numbered list.
changed the active check function to also show list items in toolbar
when multiple text lines are selected.
