Enhance Manager Users to detect errors in locale IDs

Description

When looking at overall coverage, the following shows up:

Warning: locale designations not matching locales in CLDR: ami_TW, by, din,
el_POLYTONI, fi_Fi, in, la, no, nv, pwn_TW, tl, trv_TW, tsu_TW, yu, zh-hak_TW,
zh-nan-Hant_TW, zh-nan-Latn_TW

When locales are entered, each should be validated (with a warning message if
invalid), and then all but the first subtag omitted (eg el_POLYTONI => el)

xpath

None

locale

None

Status

Priority

trivial

Assignee

Unassigned

Reporter

TracBot

tracReporter

Reviewer

None

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phase

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