git-gui: use different icon for new and modified files in the index
git-gui: use different icon for new and modified files in the index

This allows to quickly differentiate between new and modified files
in the index without selecting the file and looking at the diff.

Signed-off-by: Peter Oberndorfer <20b61243d9d81cac4ea9111eeba4b82cb384308c@arcor.de>
Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git