Minor UI cleanup.
Minor UI cleanup.

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