Made edit box use the skin pixmap and moved rendering code

  - Edit box uses skin pixmap elements to draw itself
  - Edit box uses skin element with and height to determine text offset
Fixed stretch blittin/blending

  - Take into account when the destination rectangle gets clipped
  - Changed less than to less than or equal to (last pixel row missing)
"ported" frame widget to skin pixmap, moved rendering code
Fixed progress bar drawing (horizontal bar overlapping)