F Crosstabs: Updates to UI and options

Separate checkboxes and options for chiSquared,
chiSquareContinuityCorrection and likelihoodRatio
B Crosstabs: Added Prior Concentration checkbox
B Crosstabs: added note that hypergeom is 2x2 only
Linear Regression bug fix

This fixes a bug in creating the coefficients table when one or more of
the coefficients result in NA’s.