In
d99b4b0de27a ("gitk: Accelerators for the main menu", 2015-09-09),
accelerators were added to allow efficient keyboard navigation. One
instance of the strings "Edit view..." and "Delete view" were left
without the ampersand.
Add the missing ampersand characters to unbreak our international
users.
Signed-off-by: Beat Bolli <dev+git@drbeat.li>
Signed-off-by: Paul Mackerras <paulus@samba.org>