Enable Various Translations Within `/usage` Page

[aaronskiba]

Please complete the following fields as applicable:

What version of the DMPRoadmap code are you running? (e.g. v2.2.0)

• 4.0.2+portage-4.0.1 and upcoming v4.1 upgrade

Description

• Within /usage, both the "No. plans by template" and "No. plans created based off your templates" sections include legends that display template titles. Translations are not currently enabled for these titles within the app:

• The usage statistics also display dates within the graphs as well as the downloadable CSV files. Translations are not currently enabled for these dates:

• In addition to the dates, the CSV files contain various headers. Translations are not currently enabled for these headers.

[aaronskiba]

After enabling translations for csv headers, French translations appear to be missing for the following segments:

Org name
New plans
New users
Downloads
Plans shared
No. Created Plans
Count