KineticModel: don't start the update ticker when just updating the internal position
KineticModel: don't start the update ticker when just updating the internal position

* when panning manually, the ticker would cause update events to be generated, which is unneccessary

tzapzoor/marble,adraghici/marble,Earthwings/marble,quannt24/marble,oberluz/marble,rku/marble,oberluz/marble,utkuaydin/marble,tzapzoor/marble,David-Gil/marble-dev,tzapzoor/marble,rku/marble,AndreiDuma/marble,oberluz/marble,David-Gil/marble-dev,Earthwings/marble,adraghici/marble,Earthwings/marble,AndreiDuma/marble,Earthwings/marble,utkuaydin/marble,utkuaydin/marble,quannt24/marble,tucnak/marble,David-Gil/marble-dev,rku/marble,David-Gil/marble-dev,rku/marble,David-Gil/marble-dev,adraghici/marble,rku/marble,tucnak/marble,adraghici/marble,tucnak/marble,Earthwings/marble,tzapzoor/marble,oberluz/marble,tucnak/marble,AndreiDuma/marble,utkuaydin/marble,utkuaydin/marble,quannt24/marble,probonopd/marble,tucnak/marble,utkuaydin/marble,probonopd/marble,AndreiDuma/marble,probonopd/marble,probonopd/marble,probonopd/marble,tzapzoor/marble,David-Gil/marble-dev,quannt24/marble,Earthwings/marble,probonopd/marble,adraghici/marble,tucnak/marble,AndreiDuma/marble,probonopd/marble,quannt24/marble,oberluz/marble,AndreiDuma/marble,quannt24/marble,oberluz/marble,rku/marble,tucnak/marble,adraghici/marble,tzapzoor/marble,tzapzoor/marble,tzapzoor/marble,quannt24/marble