Is your feature request related to a problem?

Deleting rectangles happens through the rectangle selection on the source image. An enhancement would be to allow users to delete rectangles by selecting the cutouts on destination image and pressing X or DEL. This is something that tremendously confused me when I first used the app

Describe the solution you’d like

To be able to click on a texture cutout on the right side of the app so that it's selected then hit X or DEL to delete it and it's corresponding rectangle from the source image

Describe alternatives you’ve considered

The work around to this is selecting the related rectangle in the source image and hitting X or DEL

Additional context

No response