RNAQC Caliper well table import wizard should check if values are missing

[Nicklas Nordborg]

The well table file from caliper is supposed to contain RQS values for all RNAQC samples on a plate. We recently found a case (CaliperPlate0019) were an entire row (E) was missing from the file. The import wizard doesn't detect this and doesn't display any warning. The end result is that we now have several RNA items with no RQS value and they will "block" the queue for auto-selecting RNA for sequencing (since it is expected that only RNA items at the very end of the queue are missing RQS values).

The RNAQC import wizard must either not allow importing the file if values are missing or the RNA with missing RQS values must be flagged for re-processing.

This wizard also lacks a comment field which would be useful in the second case.

[Nicklas Nordborg]

(In [2836]) Fixes #669: RNAQC Caliper well table import wizard should check if values are missing

RQS is set to -1 if values are missing.