move scale roate f BAckground images

 From:  okapi
1982.1 
Hi Michael,

this is a Feature request:
could you add move, scale, rotate function for background images that work the same way as the normal tools (click and drag)?
If would make it much easier to place background images in relation to objects in the scene, if one has a reference object, and the background image can then be scaled precisely - and snapped - to it.