Polling in background

[jennings]

@glehmann I noticed commit a37ea24. Could I ask what was the motivation was?

I think it's better not to poll in the background when the user won't benefit from it. Better for battery life, network usage, etc. It's think it's just polite not to use the user's computer when they're not asking us to :)

Was it just to ensure the data is updated when user happens to come back to the tab? I think if we show a loading indicator somewhere, it would be fine to refresh when the page returns to the foreground.

[glehmann]

It's for the system notifications. I expect it to send notifications even in the background.

It's still not as functional as I'd like, and I have a few local changes to enhance that.
I agree that we shouldn't poll anything if the notifications are not activated. I'll make sure that's the case.