* Remove `element.current` from `useEffect` dependencies
Changes to the `element.current` don't trigger `useEffect` rerender and shouldn't be used in the dependency array.
One discussion about is this is for example here: https://stackoverflow.com/questions/60476155/is-it-safe-to-use-ref-current-as-useeffects-dependency-when-ref-points-to-a-dom
It's also causing some subtle bugs when mounting and unmounting editors.
* Fix `FloatingMenu` and `BubbleMenu` element references
* Fix linting errors
* Don't register plugin when the editor is already destroyed; Simplify `HTMLElement` reference handling
* Fix lint error
561941d5e0