Add Front ↔ Back Image Button

[Korb]

In case of mistaken installation of the image of the front side of the card in the “Back image” slot and/or the image of the back side of the card in the “Front image” slot, it would be convenient to swap them in the editing mode with one tap. Accordingly, if the value is empty, the image will be moved from one slot to another.

Alternatively, this could be implemented without cluttering the interface — with a simple drag-n-drop after a long tap on the loaded image.