(svn r6593) -Fix: [depot window] added sprites to the buttons, that lacked one
Also changed the sprites on some of the other buttons to make the buttons consistent
Credits for this:
Drawing: skidd13 (first sprite copied/heavily inspired by Bot_40)
Grfencoding: peter1138
Coding to apply the new sprites: peter1138 (modified by me)
Ideas:
Born Acorn
MeusH
ValHallA|SW
XeryusTC
Sorry if I forgot to mention somebody