Unified Homepage view for sites across all teams

[flayks]

It's very cool to be able to separate sites with teams to clear out some clutter and group things, although I feel now that I'd have to do way more clicks to quickly see all the stats from sites that I'm part of.

It'd be great to see all the teams I'm a member of and list the sites in the same homepage view! Or somehow tabs with the other teams next to the current one, that we can quickly switch to and see all sites.