Fixes: background size of DuiContainer
Fixes: background size of DuiContainer

RevBy: TrustMe

Details: when switching header off and on again, the size of the background had a wrong height.

nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch