Crop/Modify images in Marketo

I´ve stumbled across this issue multiple times.

If I want to shrink an image so it can better fit in an email or Landing Page, I have to edit it from my computer, save it again and upload it into Marketo with a new size. This makes me have at least 5 logo images and waste a lot of time, even though the images are basically the same but change dimension slightly.

This is something that many programs for mailings solved by using internal image editing sections, which I believe Marketo should have.