linux: Don't drag window with an active drag

[apricotbucket28]

Prevents dragging the window when there's an active drag.

Release Notes:

• N/A

[phisch]

@apricotbucket28 this is still a draft, I assume that's by mistake?

[apricotbucket28]

@apricotbucket28 this is still a draft, I assume that's by mistake?

I marked this as a draft since we should actually change how a window move is started. It shouldn't allow a drag to start outside the title bar (e.g. by selecting text and moving to the title bar, or by trying to drag a non-draggable element and moving the cursor to the title bar area).

I think it'd be better to fix this "the proper way" rather than doing a partial fix 🙂