Resolves #1482

• Reviewed comments on source strings on Weblate and modified source strings accordingly if needed
• Replaced "email" with "e-mail address" when needed

Still TODO:

• https://translate.funkwhale.audio/translate/funkwhale/front/en/?checksum=6f6a3131ec8cc869 (has 2 plurals in the same string)

No need for a changelog fragment.