Fix timing issue with very short runnig operators
Fix timing issue with very short runnig operators

Ensure signal is fired after slots are connected

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