ReconstructionOperator: Use input data object for tilt angles
ReconstructionOperator: Use input data object for tilt angles

The data source is now in another thread and may not be in sync.  Use
the input data that is managed by the current thread to get the tilt
angles instead.

cryos/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,cryos/tomviz,cryos/tomviz,mathturtle/tomviz,mathturtle/tomviz,mathturtle/tomviz,OpenChemistry/tomviz