#20 Popup Menu Z-order problem

[Rob Wiskow]

When clicking through a deep list of popup menus, if
one menu overlaps a previous one, and the overlapping
area is clicked in, the click action goes to the menu
that is hidden below since it's higher in the heirarchy.

[Willie Zutz]

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This problem actually applies to anything that draws "over"
any control. z-ordering needs to be implimented across the
board. Menus will obviously always be highest on the order,
but dropdown lists need to know to draw over any controls
that may be under the section they drop into, etc.

[Rob Wiskow]

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This has been partially fixed. The drawing code should now
properly draw menus over top of everything else, though
there may be some flickering.
Properly fixing this will require some rather large changes
that are currently slated for 0.4.0.