[FEATURE] Sign out all tabs of client in the same browser (RT-2325)

[RT-2325](https://ripplelabs.atlassian.net/browse/RT-2325)
[Bountysource](https://www.bountysource.com/issues/4799089-2-ripple-trade-tabs-open-if-i-log-out-of-one-should-get-automatically-logged-out-of-the-other-tab)

BTW it's easy to log in all clients as well. I implemented it in a seperated commit.