[chores] Improve i18n coverage for user-facing strings #519#539

CodingWithSaksham wants to merge 4 commits into

openwisp:masteropenwisp/openwisp-users:masterfrom

CodingWithSaksham:issues/519-improve-i18n-coverageCodingWithSaksham/openwisp-users:issues/519-improve-i18n-coverageCopy head branch name to clipboard