feature improvement : Layout panel background tab

[pierrelabreche]

When the user modifies the background properties of a panel, particularly when changing the image fit, the position and size of the box may change.

This can happen, for example, when a panel has been precisely positioned (e.g., created in a panel grid) and the user subsequently changes the panel position using the Image Fit drop-down list.

If the user wants to restore the previous panel position and settings, there is no easy and obvious way to do so.

It would be useful to provide a visible undo control (and a Ctrl-Z keyboard shortcut) so that the panel can be returned to its previous position.

[jsachs]

This same suggestion could apply to every other transformation as well. It has been on my list for a long time, but the propect of editing 150 transformations to make the modifications is not appealing.