Blockout Specific Assignor

When entering a Blockout, be able to select the assignor that the Blockout applies to.

Use case: As a referee, I will commit to working for an assignor using Ref Insight, but the game won’t be assigned for some period of time. In that time, I will appear to be available to all assignors in Ref Insight and could be assigned by another assignor that my schedule will not allow me to be assigned to do a game for.