Background Images should "Fit" by default

The same way it works right now in video editing. When you import image or a sequence it should fit instead of stretch. Reason: "I ended up modeling objects - and after completion - realizing I was with default resolution 1920x1080 , instead of the one I needed 2048x1080. We learn on mistakes :) But still it would help a lot - will end up noticing the bars and paying atention on resolution ;) Thanks.