Tune polling period.

This is crap – we'll tune it (I don't even know how long it'll take to reach the 1 hour cap).

Created from Crucible comment by Nicolas Venegas: https://extranet.atlassian.com/crucible/cru/CR-FE-2084#c18324

Also (from pete):
as discussed in RL assuming you can detect when the window is in focus, I think you could make this a bit dubmer. Say every minute when in focus, every 5 or even 10 minutes when not.

We also want to make sure this fires regardless on window.focus (assuming that exists).