gitk: Highlight paths of interest in tree view as well
gitk: Highlight paths of interest in tree view as well

With this, when the file list window is in tree view mode, we highlight
the paths of interest.

Signed-off-by: Paul Mackerras <19a0ba370c443ba08d20b5061586430ab449ee8c@samba.org>

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