Move multiple tabs to new window

[Jan-DT]

At the moment you can select multiple tabs and drag them to a different window, but when trying to drag them outside of the window in order to open a new window, only the first one actually opens in the new window.
It would be very nice to be able to drag multiple tabs at the same time to a new window. It could massively speed up multitasking, and would probably be more consistent with user expectations.