Ab-initio has 90% unused particles

[wtempel]

Please see this related discussion:

3D ab initio job does not load entire particle stack

@jenchem A single-class ab initio reconstruction job might indeed not output all input particles. We are planning to implement a notification to that effect. After single-class ab initio reconstruction, one can still include all particles in a subsequent job by connecting as inputs all particles input to ab initio reconstruction the volume output by ab initio reconstruction