Using CEikButtonGroupContainer methods

Commands like SetCommandL or AddCommandToStackL have the parameter aPosition, which is 3 for MSK (or CEikButtonGroupContainer::EMiddleSoftkeyPosition). The following methods are also added for the MSK:

• void DimCommandByPosition(TInt aPosition,TBool aDimmed)=0;

• TBool IsCommandDimmedByPosition(TInt aPosition) const=0;

• void MakeCommandVisibleByPosition(TInt aPosition,TBool aVisible)=0;

• TBool IsCommandVisibleByPosition(TInt aPosition) const=0;