Avoid duplicating fields if they are annotated as both a characteristic and a factor

[sjhosui]

In many instances, a characteristic will be duplicated as a factor to indicate that that characteristic is a distinguishing feature of the study. The parser and file selection browser identify this as two separate fields and it ends up being duplicated in the facets and table.

[jkmarx]

Can someone provide a dataset in which this error occurs?

[scottx611x]

@jkmarx See Organism Part here:
https://refinery-dev.stemcellcommons.org/data_sets/fe8e90f3-0a83-477e-bc8a-db0b838b7938/#/files/browse

[jkmarx]

Dataset Browser Enhancements

[jkmarx]

In the data set 2 browser, the duplicate column fields are removed for the data set grid generation. In the attributes utilities, the duplicate attributes are still shown. Commit 9f34c88

[jkmarx]

Ref #849 Resolved by #1562