Fixes: NB#222844 - Compositor makes two windows direct at the same time - redirect windows from bottom to top instead of in a random order   (avoids exposing lower direct-rendered window when more than one window is    direct-rendered)
Fixes: NB#222844 - Compositor makes two windows direct at the same time
- redirect windows from bottom to top instead of in a random order
  (avoids exposing lower direct-rendered window when more than one window is
   direct-rendered)

nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor