We didn't extract the strings inside wxGetTranslation() in the message catalog
when creating it using xgettext, do it now.
This notably fixes the missing translations for the generic progress dialog
elapsed/estimated/remaining time labels.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74693 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775