Fix some translation warnings after migrating to gettext
There's still this warning that seems inconsequential, so I've left things as they are:
/usr/sbin/xgettext: warning: msgid 'Ma_ke Link' is used without plural and with plural.
thunar/thunar-action-manager.c:283: Here is the occurrence without plural.
thunar/thunar-action-manager.c:1638: Here is the occurrence with plural.
Workaround: If the msgid is a sentence, change the wording of the sentence; otherwise, use contexts for disambiguation.