Add Undo to moving (dragging) zone in UI editor

[Mariusthvdb]

having a carefully curated set of Zones including tight lat/long settings to be as precise as required as possible, we have no way to correct an accidental drag of a zone in the zone editor.

Please consider adding an Undo like button, so we can revert accidental mistakes, that are very easily done, simply because of the type of card Map is.

We need to slide it left/right to get the right position and scale it. During that proces, an accidental drag happens rather easily...