Don't change window focus until a mouse click is made.

[Echo23Bravo]

When moving the mouse cursor to another computer, it would be nice if there was no new window focus until a mouse click is made.

Right now, once the cursor is moved to the new screen, it automatically gets focus and keystrokes go there. This isn't the expected behaviour if this was one computer with multiple monitors. Every once in a while, I'll accidentally bump the mouse to the other screen, and start sending keystrokes to the wrong computer.

Instead, keystrokes should not be sent to another monitor / computer until a click is made. If I have focus on a window on computer 1, and the mouse is moved to computer 2, all keystrokes should still be sent to computer 1 until a click is made on computer 2.