SYMBIAN: Add a minimize (MIN) key shortcut to the virtual Qwerty keyboard (ABC).

[huhungahuru]

ScummVM 2.2.0b/OS: Symbian Belle/touchscreen

With the ABC key you can access the Qwerty keyboard, but there is no key to minimize without closing the shortcut bar.
Another key on the bar is CUR, which allows us to access the numeric keyboard. Here is the MIN key to minimize without closing the bar.

Attached image: ​https://archive.org/download/de5_jdh768/3.png

The minimize key (MIN) that is on the numeric keyboard (CUR) must be added to the Qwerty keyboard (ABC).
*It would improve interaction on touch screens.

[lotharsm]

Closing due to port removal in 5e05f93f36a998f08a676bb3db22b673f677d3f8