Fixed the Windows Table reimplementation's redraw issues. Thanks again to Jonathan Potter (http://stackoverflow.com/a/26747199/3408572).
Removed now-fixed TODOs.
Added some prerequisite bookkeeping needed for Windows Table horizontal scrolling.
More TODOs.
Implemented horizontal scrolling. Horizontally scrolled drawing not yet implemented.
Handled horizontal scrolling in drawing. Now to fix the header...
More TODOs.