Initial delay creates issue with online plots completion in ephys rig and biased task

[oliche]

In Seattle, when they run a biased CW session to train an animal on the ephys rig, the green screen of the online plots comes in too soon.

The online plots computes the session duration from the end of the first trial to the current trial. Somehow this configuration does not fit with the biasedCW.

The inclusion of this delay in the state machine is a design issue to start with, and this delay should be implemented by waiting outside of the state machine (after a check that the camera is working probably).