Mouse pointer control using the keypad when NumLock is off

[md]

Unlike in GNOME, in Ubuntu MATE (18.04.1) you cannot use the Num Lock key as a mode switch for emulating the mouse-actions-using-the-keypad function: "The mouse cannot be controlled with the keypad when Num Lock is turned on, though." (https://help.ubuntu.com/stable/ubuntu-help/mouse-mousekeys.html.en)

In Ubuntu MATE if you activate the "Pointer can be controlled using the keypad" function, then whether Num Lock is on or off doesn't matter, you always stay in the mouse-with--the-keypad mode.

It would be very useful to implement the function of the Num Lock to quickly switch keypad's mode of operation, especially if you also need to type numbers.

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Description: Ubuntu 18.04.1 LTS
Release: 18.04