fix: Correct wording when attempting to remove a disabled app

[Pytal]

Summary

Fixes the confusing wording due to the mismatch between method name vs what the method actually does

server/lib/private/App/AppManager.php

Line 391 in 0729e26

* Check if an app is enabled in the instance

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[come-nc]

We should rename the method and the related ones, it’s highly confusing.
I’m not sure I understand how getInstalledAppsValues is working and what it’s doing.

[come-nc]

Ah, enabled can contain a list of group ids, this is what I was missing.
I may open a PR to improve the app manager.