TODO's (no priority order)

 - Optimize remove / redraw of caret, use pixbuffer instead?
 - Optimize drawing of bitmaps on Low-Memory machines
 - Restore the Palette when Windows get's the Focus
   -> only needed for <= 256 colors
 - Make drawing of tiled bitmaps optional ( they are slooow )
   -> already optimized, still needed?
 - only copy visible rects when copying screen rects ( during scroll ).
 - Make context menu more stable, Bug lurking within core?
 - Implement TreeView History
 - Implement TreeView SSL Dialog
 - Implement Native Select Menu
 - Implement offscreen plotter
 - Implement Options Dialog
 - Implement SystemColors
 - Replace RSC strings with string from messages file.
 - Optimize Offscreen Plotter: Save inactive framebuffers to disk?
 - Ensure that a font-face is set to the default font when it couldn't be loaded.
 - Loose focus for browser / url widget etc. when changing focus
   ( at best, implement callback for this...)
 - Have browser_window specific cursor, window specifc cursor
 - When minimized (not iconyfied) NetSurf doesn't recognize that.
 - Tabs? ( several tab-favicons when iconyfied?)
 - improve mouse tracking
 - fix this:
path2url in: ./res/icons/dir.png
path2url out: file:///./res/icons/dir.png
url2path in: file:///./res/icons/dir.png
 - loesung fuer kompletten tree icons path finden