Fix for fixing state after turning setAllowsMixedState to NO.
Fix for fixing state after turning setAllowsMixedState to NO.

Reviewed by me.

koamac/Cappuccino,akshell/cappuccino,Rosch/cappuccino,FrankReh/cappuccino,cappuccino/cappuccino,Dogild/cappuccino,rgv151/cappuccino,Rosch/cappuccino,tancred/cappuccino,Dogild/cappuccino,tancred/cappuccino,Rosch/cappuccino,mrcarlberg/cappuccino,tolmasky/cappuccino,eventualbuddha/cappuccino,tolmasky/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,tancred/cappuccino,tancred/cappuccino,daboe01/cappuccino,enquora/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,rgv151/cappuccino,kidaa/cappuccino,enquora/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,enquora/cappuccino,wangshijin/cappuccino,tancred/cappuccino,zittix/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,deltaprojects/cappuccino,akshell/cappuccino,mrcarlberg/cappuccino,deltaprojects/cappuccino,krodelin/cappuccino,cappuccino/cappuccino,mrcarlberg/cappuccino,rgv151/cappuccino,eventualbuddha/cappuccino,Rosch/cappuccino,krodelin/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,akshell/cappuccino,cacaodev/cappuccino,primalmotion/cappuccino,krodelin/cappuccino,AlexanderMazaletskiy/cappuccino,zittix/cappuccino,kidaa/cappuccino,cacaodev/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,FrankReh/cappuccino,deltaprojects/cappuccino,primalmotion/cappuccino,Dogild/cappuccino,eventualbuddha/cappuccino,krodelin/cappuccino,deltaprojects/cappuccino,rgv151/cappuccino,kidaa/cappuccino,cacaodev/cappuccino,dgvivero/CappCoreData,daboe01/cappuccino,deltaprojects/cappuccino,enquora/cappuccino,koamac/Cappuccino,cappuccino/cappuccino,krodelin/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,mrcarlberg/cappuccino,primalmotion/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,cappuccino/cappuccino,AlexanderMazaletskiy/cappuccino,cacaodev/cappuccino,koamac/Cappuccino,Dogild/cappuccino,zittix/cappuccino,mrcarlberg/cappuccino,280north/cappuccino,Rosch/cappuccino,FrankReh/cappuccino,krodelin/cappuccino,zittix/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,daboe01/cappuccino,akshell/cappuccino,krodelin/cappuccino,tancred/cappuccino,eventualbuddha/cappuccino,mrcarlberg/cappuccino,FrankReh/cappuccino,enquora/cappuccino,zittix/cappuccino,daboe01/cappuccino,AlexanderMazaletskiy/cappuccino,dgvivero/CappCoreData,enquora/cappuccino,primalmotion/cappuccino,deltaprojects/cappuccino,Rosch/cappuccino,wangshijin/cappuccino,280north/cappuccino,rgv151/cappuccino,daboe01/cappuccino,dgvivero/CappCoreData,cappuccino/cappuccino,koamac/Cappuccino,AlexanderMazaletskiy/cappuccino,tolmasky/cappuccino,rgv151/cappuccino,280north/cappuccino,280north/cappuccino,tolmasky/cappuccino,wangshijin/cappuccino,280north/cappuccino,enquora/cappuccino,dgvivero/CappCoreData,daboe01/cappuccino,AlexanderMazaletskiy/cappuccino,koamac/Cappuccino,AlexanderMazaletskiy/cappuccino,cacaodev/cappuccino,FrankReh/cappuccino,Dogild/cappuccino,rgv151/cappuccino,zittix/cappuccino,dgvivero/CappCoreData,zittix/cappuccino,cappuccino/cappuccino,daboe01/cappuccino,koamac/Cappuccino,cacaodev/cappuccino,tolmasky/cappuccino,cappuccino/cappuccino,deltaprojects/cappuccino