Highlighting works improperly when the pointer moves out of a window

[Luminarys]

When highlighting text in a window, if the mouse either moves out of the window or crosses over another window, the pointer movement handler is no longer called on the, and events stop being passed to the window.

[Cloudef]

It might be acceptable exception to lock pointer focus while "dragging", and send pointer events to that locked view.

[Luminarys]

Yep, that would probably work well.