Similar to master commit cb025cec64,
except that I just redid the search-replace as there were annoying
conflict merge (was easier to just redo massive search-replace).
See commit f8f3a74971.
The context change was basically a bug fix, and nothing changed in the
original string, nor its actual GUI context/usage. Therefore there is no
need to invalidate the translations (mark it "fuzzy", which would be
what would happen automatically after this change) for the 43 languages
which already translated these. Let's just search-and-replace all the po
files with the correct context.
For the record, I got the green light from several translators on
gnome-i18n ML so let's fix. :-)
(cherry picked from commit 7a5e5be35e)
