16x16 Solid Black Outline Update

There has been a request for solid black outlined versions for the 16x16 iconsets. I created a bunch of new sheets in a subfolder called "black" which exchanges the normal colored outline with a solid black version. Those icon edits come with all of the usual versions, so now you can have double outlined icons, if you want to use the 18x18 sized sets.

I hope you will enjoy this update. Best,

Thomas