Hack to somehow fix drawTiles for html5 target

This fix:
  - Change __bounds.width and __bounds.height for case, when parent shape (but not stage) has some transformations, especially scaleX or scaleY.
  - Modifies __bounds.x and __bounds.y to draw tiles correctly, when shape has non-zero x or y. This part of fix required appropriate fix in CanvasGraphics.