ui: Use mnemonics for remote-viewer connection UI
Here we added mnemonics for the buttons "Cancel" and "Connect" and also
for the "Connection Address" entry (as it was before moving this dialog
to a .ui file).
The "Recent connections" widget is left behind as GtkRecentChooserWidget
isn't suitable for mnemonic activation.
Resolves: rhbz#1351487
Signed-off-by: Fabiano FidĂȘncio <fidencio@redhat.com>
Acked-by: Pavel Grunt <pgrunt@redhat.com>