Displayed language for thesaurus service provider is inconsistent/incorrect

[tris-ots]

The displayed language for a given thesaurus service provider in System Settings > System Data Settings > System Data Settings > Thesaurus Service Provider changes depending on what language the System Settings page is being displayed in.

I've reproduced this error on both a local test VM running Arches 7.6.6 and on a VPS running 7.6.0. Languages in both cases were en and fr-fr. I encountered this bug while attempting to resolve the problems described in #11794.

The actual language of the thesaurus service provider can be viewed by examining the tiles table in postgres, if you can work out what the provider's UUID is - I wasn't sure how to determine this reliably.

Steps to reproduce:
(In an Arches 7.6.x install with at least two installed languages)

• In the System Settings page, create a thesaurus service provider entry with any language the system is configured for.
• Switch languages (eg, go from https://domainname/en/settings to https://domainname/fr-fr/settings) and find the thesaurus provider you just created.
• Click the Languages (or Langues, etc) dropdown in the thesaurus service provider pane to show the provider's language.

Expected behavior:

• The displayed language of the provider should be consistent with the language specified at the time of creation.