Extensions vs MIME image types on quads

[LT.Forever]

So I've been messing around with manialinks, interface editor and other related tools and noticed one thing that sort of bugs me out:

Right now quads accept images with extensions of .jpg/.png/.tga/.dds. Sure it's a good system for local files but let's say I want to use an online API that takes a REST type uri without an extension (e.g. ".../image/someid/"). It gives back an image/jpeg or image/png yet the image is still not visible in the manialink (or at least I couldn't make it to work).
Is there any way to make it work with MIMEs and not extensions?

[The_Big_Boo]

You can simply add "?.png" or "?.jpg" to your url. It should be ignored by the API and your image will be shown.

[LT.Forever]

Thanks. A weird workaround but works