Remove faulty assumption about itext/text ref attributes
Add test
Remove completed todo
PEP8 compliance
precompile regexes
Alter bulk app translation download to conform to Vellum bulk form translation format

The form sheets of the bulk app translation download now have ids for each label in the same form as
the Vellum bulk form translation tool. The rows are no populated by looking at the existing itext node
as opposed to looking at the questions.
remove note
Update bulk app translaiton import to handle new form sheet translation identifiers
Add missing language fallback values for labels
updated tests
Removed unused functions
Cleaned up tests
remove lint
minor improvements
Merge pull request #5109 from dimagi/BAT-refactor

Bring bulk app translation format in line with Vellum bulk form translation (and fix a bug)