Fix bug in tabular coach reports.
Tweak new messages for punctuation, capitalization, and to be less fragmentary.
Small translation tweaks, based on po file scrubbing.
Merge branch 'translation_scrub' of github.com:bcipolli/ka-lite into translation_scrub
Merge branch 'develop' of github.com:learningequality/ka-lite into translation_scrub
Merge branch 'develop' of github.com:learningequality/ka-lite into translation_scrub
Merge pull request #1296 from bcipolli/translation_scrub

Scrub strings for translation