Notify new sidebars that a user is already logged in.
Merge with master.
Fix sync between multiple sidebars.
Merge remote-tracking branch 'upstream/master' into multiple-sidebars
Merge with master.
Handle edge case: do not display the user list when opening a second window if the user has signed out from the first window.
Adapt front-end tests to expect the talkilla.log{in,out}-success messages to be broadcast.
Notify new sidebars of talkilla.login-success only if there's actually a user logged in, and add tests.
Add a 'should notify new sidebars of the current users' test.
Merge pull request #115 from fqueze/multiple-sidebars

Handle multiple sidebars and keep them in sync