Changes: MSheet - recommend MBasicSheetHeader in its documentation
Changes: MSheet - recommend MBasicSheetHeader in its documentation

RevBy: TrustMe
Details: Make sure people notice the existence of MBasicSheetHeader.

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