Drop Down Box item ignores the selection when the user switches from mouse to keyboard input

[taurhine]

First of all, awesome work!
While playing around with the lguitest I think I've just found a little bug in the drop down list control.

Here's how you reproduce the strange behaviour:
If you click a drop down list control and leave the mouse cursor on an item but then choose some other item from the list via keyboard, the control ignores what you've chosen via the keyboard and selects the item which was under the cursor.

[frank256]

Thank you very much.