Commit dialog: IDC_BUGIDLABEL and IDC_BUGID were overlapping

In the commit dialog, BUG label and BUG ID edit box were overlapping. This patch shortens the label so that it doesn't go under edit box.

I'm not sure what was the original intent here; it works for us better this way.

Signed-off-by: Jano Svitok <jsv@whitestein.com>