Modify the paths to saved data in the state file
Modify the paths to saved data in the state file

If the user uses the Save Data function, the path to the saved file is
preferred when loading the state file and reading the data back in.
Make the state file save the relative path to the saved data so that the
state + data files can be moved.

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