* Make some managers concurrency-safe
- IntentsManager: @MainActor, non-shared, continuation
- SSIDReader: @MainActor, continuation
- Reviewer: main queue, non-shared
* Review wrong use of Concurrency framework
There were background thread calls e.g. in VPNToggle, because
ProfileManager was used inside a VPNManager async call.
Annotate @MainActor wherever a Task involves UI.
* Make main managers MainActor
* Apply MainActor to Mac menus
* [ci skip] Update CHANGELOG
* Set MainActor consistently on Mac menu view models
Broken in dec7fb9030
VPN was lost when app was sent to background. Current (and active)
profile was persisted with nil isActive and instead of ignoring
profile activation, isActive was falling back to
allHeaders.isEmpty (false), erroneously deactivating the profile
and disconnecting the VPN.