Prefer the active view if it is a RenderView
Prefer the active view if it is a RenderView

Do some checking to make sure the active view is a RenderView, if it is
anything else set the active view to the first RenderView available.

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