It should be possible to scroll combo box with keyboard "up" and "down"

[fabio]

When you want to scroll all maps that appears on a combo box you have to click on it and select the next map. It would be nice to be able to use the keyboard, so that you can select the first map and then just press the "down" key to go to the next map. You can check all maps much quicker this way and this is what happens on every OS combobox.

[leper]

See #1532 (point 6) for that. The drop-down box looses focus so you can't use the arrow keys to navigate the items.