Lets rename the multiargument SetPosSizePixel to
setPosSizePixel drop the various using Window::SetPosSizePixel
and work towards de-virtualizing SetPosSizePixel/SetPosPixel and
SetSizePixel and doing the work in a virtual setPosSizePixel

Change-Id: I7057654168001b67becee1791e97f9e9dc01f7b8