Can only pick .png in Background > Display imagein in front

[noahdotpy]

Title ^

[mgord9518]

Thanks for the issue report! I'll do a quick fix for now and then do a much needed rework of the program to clean it up (which should also add support for some extra image formats that i3lock-color doesn't support by automatically converting them)

[mgord9518]

Actually looking further into it, i3lock-color appears to only support PNG and raw images. I should have it refactored in a couple days though.