* v3.12.0...v3.16.0
* Upgrades
* Remove old wormhole fix
* Fixup ember power select (camelcasing)
* Fixup immedaitely closing dropdown
When clicking on the syntax selector, it seemed like an extra click
event was firing from the label, which then immediately closed the
dropdown. By adding a for="" attribute this event isn't passed to the
dropdown menu and therefore doesn't immediately close
* Fix up integration tests with new style (plus standardize titles)
* Temporarily disable some template linting rules
* Add required methods (even though they aren't used anywhere)
* Ensure event sources get closed on destruction
Adds namespace support to the UI:
1. Namespace CRUD/management
2. Show Namespace in relevant areas (intentions, upstreams)
3. Main navigation bar improvements
4. Logic/integration to interact with a new `internal/acl/authorize` endpoint
