L10n last batch 839157

Last batch of l10n email thingies.

My development cycle was like this:

* convert a template from Django to Jinja
* run the tests to make sure at least one test failed
* updated the code
* run the tests to make sure they all pass again

Before creating the PR, I:

* ran the tests--they all pass
* did an extract and merge and verified strings are in messages.pot file
* verified we've updated all the .ltxt files except pw_reset.ltxt (that has its own bug)

r?