fix hiding buttons after deleting paragraph
fix hiding buttons after deleting paragraph

HeapCity/medium-editor-insert-plugin,joar/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,oosidat/medium-editor-insert-plugin,oosidat/medium-editor-insert-plugin,leafiy/medium-editor-insert-plugin,orthes/medium-editor-insert-plugin,HeapCity/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,HeapCity/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,orthes/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,leafiy/medium-editor-insert-plugin,hubrick/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,anorudes/medium-editor-embed-plugin,joar/medium-editor-insert-plugin,hubrick/medium-editor-insert-plugin