[City OFN Voucher] Fix VINE connected app settings

[rioug]

What? Why?

• Closes [City OFN Voucher] Change link + remove a sentence on settings page #13006

Split the description and link to VINE in two translatable string. Description is now hidden when an enterprise is connected to VINE.

What should we test?

• Go to /admin/enterprises/NAME/edit#/connected_apps_panel for an enterprise not connected to VINE yet
• Check the link to VINE is correct
• Check the sentence "To enable VINE for your enterprise, enter your API key and secret." appears
• Add your API key
• Check the sentence "To enable VINE for your enterprise, enter your API key and secret." does not appear anymore

Release notes

Changelog Category (reviewers may add a label for the release notes):

• User facing changes
• API changes (V0, V1, DFC or Webhook)
• Technical changes only
• Feature toggled

The title of the pull request will be included in the release notes.

[dacook]

I can see that you're hiding the description once connected, because it describes how to connect. Maybe we should have a different string for each case, eg enabled_description_html and disabled_description_html (this could be helpful for other connected apps too).

Also this is related to #13011
On that PR, Konrad is saying that they would prefer to not have to edit HTML, so would need separate keys for the link text and href.

So... I'm thinking it might be time to manage these strings in the DB, and give instance managers an easier way to update them (with a rich text editor). Maybe we can fit that in with this funded feature? I'll mention that on the other PR.

[rioug]

@RachL what do you think of David's suggestion ?

[RachL]

@rioug @dacook It's a nice idea, but I'm not 100% comfortable with the global spreadsheet just yet to confirm we have funding for this. I suggest for now we proceed with PRs handling translation and I will create something in the backlog and hopefully we can fund it.

[dacook]

Sure. I think this is fine to go ahead, and is compatible with my idea in case we do that in the future.

[RachL]

@rioug small fix needed: when not connected or disconnected the link is showed twice:

otherwise all good 💪 back to in dev