Improve dragging tab to a new window on wayland (support for xdg-toplevel-drag)

[Friedrich]

Currently on Linux systems with wayland the user experience when dragging a tab to open a new window is not good. The window only spawns once the user drops the tab and the new window spawns in the wrong location.

From my understanding the xdg-toplevel-drag protocol can be used to solve this issue.

[Jon]

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[mknn]

Dragging out is crucial, experience on wayland forces me to switch to another browser. It is terrible on windows comparing to other browsers, but on wayland is really tragic.