Fix .res.in to .res.h in POTFILES.in

Affects-bug: lp-913458
Fix menu gettextization

Changes were made to eliminate errors output by 'make distcheck'
or 'make -C po update-po'.

Closes-bug: lp-913458
Menu items i18n

This adds i18n for gtk menus

Closes-bug: lp-1113758