Slot names were changed for the PV proxy widgets
Slot names were changed for the PV proxy widgets

Updated the code to account for the new names.

cjh1/tomviz,OpenChemistry/tomviz,thewtex/tomviz,cjh1/tomviz,mathturtle/tomviz,thewtex/tomviz,Hovden/tomviz,OpenChemistry/tomviz,mathturtle/tomviz,yijiang1/tomviz,cryos/tomviz,Hovden/tomviz,thewtex/tomviz,mathturtle/tomviz,cjh1/tomviz,OpenChemistry/tomviz,yijiang1/tomviz,OpenChemistry/tomviz,cryos/tomviz,cryos/tomviz