refactor GUiRenderingControl, clear dependency to viz
expose GUIRenderingControl to addongui lib
pvr: do not show selection dialog for a single menu hook
addongui: add window to button translater
dvdplayer: fix seek for small steps, use displayed pts as reference
Revert "[pvr] fixed - seek passed the time since the epg item started, which won't work for seek operations"

This reverts commit c1f11e6580f8b9ede2637a6981c6f7e53b60dff1.
multi-screen: fix compilation on windows