emit repaintNeeded() whenever the visible bbox changes
emit repaintNeeded() whenever the visible bbox changes

repaintNeeded() should be emitted whenever MarbleMap needs to be repainted. This is the case when the visible bbox changes, so emit it.

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