make GeoGraphicsScenePrivate::addItems() static and rename to mergeItems()
make GeoGraphicsScenePrivate::addItems() static and rename to mergeItems()

quannt24/marble,probonopd/marble,tzapzoor/marble,tucnak/marble,quannt24/marble,tzapzoor/marble,tzapzoor/marble,probonopd/marble,probonopd/marble,tzapzoor/marble,tucnak/marble,tzapzoor/marble,quannt24/marble,tzapzoor/marble,quannt24/marble,probonopd/marble,quannt24/marble,probonopd/marble,tucnak/marble,tzapzoor/marble,tucnak/marble,quannt24/marble,tucnak/marble,tucnak/marble,probonopd/marble,tucnak/marble,quannt24/marble,probonopd/marble,tzapzoor/marble