(1) Have one element in row, edit it, move it to another row, try to delete now empty row, alert appears with warning that row is not empty.
Probably that caused because element moving is done with ajax, but alerts are attached on page refresh.

(2) After switching screen elements places alignment is not switched.

(3) if screen does not fit horizontally in the browser window, 'select' button for the element (while editing it) is wrapped and the input field bleeds over other columns. (See screen_element_selection.png)