Fix manual water annotation QC plot

[arjunsridhar12345]

Issue with the way manual water is being annotated. seems to be the way the code is trying to correlate with the reward times.

See https://github.com/AllenNeuralDynamics/DF-Refactoring/issues/197 for more information

[arjunsridhar12345]

renaming this issue so its scoped to just the qc plot

[arjunsridhar12345]

closed by #97