Bug 1059650 - [Browser]Back button stops working after clicking '+' icon multiple times

* Doesn't rely on 'mousedown' event to get the tab ID, use 'tap' event to select tab ID directly
Merge pull request #26228 from begeeben/1059650_back_button_stops

Bug 1059650 - [Browser]Back button stops working after clicking '+' icon multiple times, r=Dale Harvey