fix gridColor when decoding a CPTableView
fix gridColor when decoding a CPTableView

Don't default to a gray color when there is no grid color in the cib.
The tableview theme will automatically set the correct grid color.

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