Add generic image tool

[littlefyr]

Icons are great but sometimes I need to convert logos or background images.

What I'd like to see is the exact same thing as the icon tool but just load a generic image, and let me set its "natural" mdpi size and then scale the contents accordingly.

[AndroidGecko]

+1 also I miss same tools as in launcher (circle, elevation,etc)

[MrVilkaman]

+1

[bryant1410]

+1

[Pirdad]

+1 thanks

[DiepEsc]

+1, Thanks