Add ability to clone child data sources
Add ability to clone child data sources

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