[BUG #7785] qx.bom.Viewport.getHeight(win) return wrong value under ios 7.0
* Updated viewport calculation for iOS7 in portrait mode.
[BUG #7785] qx.bom.Viewport.getHeight(win) return wrong value under ios 7.0
* Updated viewport calculation for iOS7 in portrait mode.
[BUG #7785] qx.bom.Viewport.getHeight(win) return wrong value under ios 7.0
* Updated viewport calculation for iOS7 in portrait mode.