Fix -updateTrackingAreas
Fix -updateTrackingAreas

Due to some unknown changes updateTrackingAreas can be called
while visibleRect is empty and is never called again, breaking
the mouse tracking.

root-mirror/root,gganis/root,satyarth934/root,georgtroska/root,mhuwiler/rootauto,pspe/root,agarciamontoro/root,Y--/root,root-mirror/root,mhuwiler/rootauto,Y--/root,agarciamontoro/root,CristinaCristescu/root,BerserkerTroll/root,sawenzel/root,buuck/root,esakellari/root,davidlt/root,jrtomps/root,gganis/root,davidlt/root,abhinavmoudgil95/root,davidlt/root,jrtomps/root,karies/root,Y--/root,satyarth934/root,thomaskeck/root,veprbl/root,zzxuanyuan/root-compressor-dummy,veprbl/root,sawenzel/root,abhinavmoudgil95/root,sawenzel/root,agarciamontoro/root,veprbl/root,georgtroska/root,CristinaCristescu/root,esakellari/root,mkret2/root,lgiommi/root,satyarth934/root,agarciamontoro/root,Y--/root,sirinath/root,olifre/root,jrtomps/root,olifre/root,sirinath/root,sirinath/root,thomaskeck/root,olifre/root,Y--/root,jrtomps/root,simonpf/root,esakellari/root,karies/root,krafczyk/root,georgtroska/root,zzxuanyuan/root,lgiommi/root,buuck/root,karies/root,simonpf/root,agarciamontoro/root,BerserkerTroll/root,beniz/root,buuck/root,mhuwiler/rootauto,sawenzel/root,mattkretz/root,mkret2/root,sawenzel/root,gbitzes/root,krafczyk/root,CristinaCristescu/root,zzxuanyuan/root,root-mirror/root,lgiommi/root,krafczyk/root,pspe/root,karies/root,georgtroska/root,abhinavmoudgil95/root,CristinaCristescu/root,georgtroska/root,lgiommi/root,krafczyk/root,beniz/root,esakellari/root,agarciamontoro/root,mhuwiler/rootauto,mhuwiler/rootauto,bbockelm/root,bbockelm/root,veprbl/root,zzxuanyuan/root,esakellari/root,gbitzes/root,jrtomps/root,CristinaCristescu/root,satyarth934/root,mkret2/root,gbitzes/root,krafczyk/root,gbitzes/root,beniz/root,sawenzel/root,simonpf/root,esakellari/root,pspe/root,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,karies/root,gbitzes/root,abhinavmoudgil95/root,bbockelm/root,root-mirror/root,krafczyk/root,zzxuanyuan/root,sawenzel/root,mattkretz/root,buuck/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,sirinath/root,pspe/root,pspe/root,sirinath/root,veprbl/root,zzxuanyuan/root-compressor-dummy,gganis/root,simonpf/root,zzxuanyuan/root,Y--/root,mattkretz/root,Y--/root,thomaskeck/root,BerserkerTroll/root,root-mirror/root,lgiommi/root,esakellari/root,simonpf/root,esakellari/root,satyarth934/root,root-mirror/root,root-mirror/root,mattkretz/root,satyarth934/root,karies/root,veprbl/root,CristinaCristescu/root,gbitzes/root,mattkretz/root,BerserkerTroll/root,davidlt/root,olifre/root,simonpf/root,davidlt/root,zzxuanyuan/root,BerserkerTroll/root,pspe/root,mattkretz/root,abhinavmoudgil95/root,davidlt/root,buuck/root,georgtroska/root,CristinaCristescu/root,buuck/root,zzxuanyuan/root,beniz/root,zzxuanyuan/root-compressor-dummy,satyarth934/root,olifre/root,abhinavmoudgil95/root,mkret2/root,BerserkerTroll/root,abhinavmoudgil95/root,root-mirror/root,olifre/root,BerserkerTroll/root,lgiommi/root,jrtomps/root,jrtomps/root,Y--/root,mattkretz/root,mhuwiler/rootauto,mhuwiler/rootauto,zzxuanyuan/root,gbitzes/root,thomaskeck/root,Y--/root,krafczyk/root,buuck/root,zzxuanyuan/root,thomaskeck/root,krafczyk/root,lgiommi/root,sirinath/root,krafczyk/root,davidlt/root,davidlt/root,beniz/root,pspe/root,mattkretz/root,jrtomps/root,BerserkerTroll/root,mkret2/root,gganis/root,CristinaCristescu/root,gganis/root,beniz/root,mhuwiler/rootauto,BerserkerTroll/root,sawenzel/root,beniz/root,simonpf/root,jrtomps/root,georgtroska/root,gganis/root,bbockelm/root,root-mirror/root,bbockelm/root,bbockelm/root,mkret2/root,agarciamontoro/root,mkret2/root,pspe/root,zzxuanyuan/root-compressor-dummy,satyarth934/root,sirinath/root,sirinath/root,gbitzes/root,buuck/root,karies/root,beniz/root,karies/root,buuck/root,mkret2/root,simonpf/root,georgtroska/root,abhinavmoudgil95/root,gbitzes/root,lgiommi/root,gbitzes/root,bbockelm/root,CristinaCristescu/root,mkret2/root,thomaskeck/root,zzxuanyuan/root,veprbl/root,satyarth934/root,bbockelm/root,zzxuanyuan/root,mkret2/root,CristinaCristescu/root,root-mirror/root,agarciamontoro/root,georgtroska/root,gbitzes/root,esakellari/root,gganis/root,satyarth934/root,lgiommi/root,gganis/root,abhinavmoudgil95/root,karies/root,pspe/root,bbockelm/root,krafczyk/root,beniz/root,davidlt/root,mattkretz/root,gganis/root,sirinath/root,CristinaCristescu/root,davidlt/root,satyarth934/root,olifre/root,lgiommi/root,pspe/root,mhuwiler/rootauto,agarciamontoro/root,simonpf/root,karies/root,bbockelm/root,karies/root,veprbl/root,sirinath/root,thomaskeck/root,beniz/root,zzxuanyuan/root-compressor-dummy,georgtroska/root,thomaskeck/root,veprbl/root,thomaskeck/root,buuck/root,sirinath/root,thomaskeck/root,agarciamontoro/root,bbockelm/root,simonpf/root,jrtomps/root,zzxuanyuan/root-compressor-dummy,abhinavmoudgil95/root,sawenzel/root,pspe/root,gganis/root,beniz/root,gganis/root,georgtroska/root,zzxuanyuan/root,zzxuanyuan/root-compressor-dummy,krafczyk/root,olifre/root,abhinavmoudgil95/root,mattkretz/root,esakellari/root,Y--/root,mkret2/root,jrtomps/root,mhuwiler/rootauto,lgiommi/root,olifre/root,olifre/root,Y--/root,mattkretz/root,esakellari/root,olifre/root,zzxuanyuan/root-compressor-dummy,buuck/root,veprbl/root,simonpf/root,mhuwiler/rootauto,zzxuanyuan/root-compressor-dummy,root-mirror/root,sawenzel/root,veprbl/root,sawenzel/root,agarciamontoro/root,davidlt/root