[0.15.5] map generator preset description doesn't update..

[qlf00n]

.. when using arrows. If I choose a preset with a mouse button, the description changes. It does not if I scroll through options using keyboard arrows buttons.

[daniel34]

Duplicate of viewtopic.php?f=48&t=44522, it's a minor issue.

Arrow keys to navigate the GUIs aren't really supported at all. You have to use the mouse.