Make the open url in tab feature a bit more discoverable
Introduce a context menu item that invites to open the button under the menu in a tab.
It used to just work with the middle button, now it works with control+click as well, much like in web browsers.
Reviewed By: Dolphin, ngraham, elvisangelaccio
Subscribers: elvisangelaccio, kde-frameworks-devel
Differential Revision: https://phabricator.kde.org/D17550