This tests ImageButton, Tooltip and ComboBox.
Mouse over a button and then leave it for one second, and a tooltip should appear for 20 seconds, or until the mouse is moved off the button.
Tooltips do not appear for disabled screen objects.
As with ImageButtonTest, clicking the first button enables or disables the second button.
To the right is a ComboBox. Click the down-arrow button to drop down its list. Note that if you type something and then drop down the list, an item starting with that text is selected if possible. Some ComboBox behaviors that might be implemented are not, and will depend on your feedback.
The ComboBox button demonstrates use of an ImageButton with transparent GIFs as its images for the normal and mouseover states. Transparency is especially useful when the button may become larger than its preferred size.
You may notice that if you drop down the list and then bring up a tooltip, the list goes away. This is because it shares the same "floating panel" that tooltips use.