Notification count on multi-account switcher

[mary-ext]

Is your feature request related to a problem? Please describe.

It's nice having multiple accounts for different sorts of posting, but to find out if you've got a notification at all you'd have to actually switch into the account first.

Describe the solution you'd like

Multi-account switcher should show a notification counter

Describe alternatives you've considered

None.

Additional context

Might be somewhat problematic? This would be rather trivial if the app is written to have multiple agent instances going. Alternatively we could have a separate authentication method where it gives you an agent instance but it won't replace the "global" agent

[pfrazee]

Not impossible. Bit of a lift but it's doable.

[mary-ext]

Hm, should the notification count be reliable at all? I'd imagine we could skip the preferences query (for moderation) and use the count query if so.