|SOURCE|
[Common::System::Window]
* GrabMouse accepts a parameter to confine the mouse cursor to the current
  window as well as to centre the mouse
[Linux::System::LinuxWindow]
* EnterNotify and LeaveNotify XEvent types are handled in the processing loop
  within Update, grabbing the keyboard and mouse, and releasing the keyboard
  and mouse, respectively
* GrabKeyboard no longer grabs the input exclusively for the window owner
* GrabMouse centres the mouse if the appropriate parameter is set to ZED_TRUE
* GrabMouse will confine the mouse to the window if the appropriate parameter
  is set to ZED_TRUE
* GrabMouse no longer grabs the mouse exclusively for the window owner