This should concetrate all special handling we need to do with units,
especially in regard to template based strings.

Currently translated at 70.9% (554 of 781)

Build full set of updates and push them to backend just once

Currently translated at 70.9% (554 of 781)

Using class attribute seems more readable than self.get_file_format().

Currently translated at 70.7% (552 of 781)