Update UI help for rule attributes in "Add attribute column" UI for guided decision tables.

In guided decision tables > Columns > Insert column > Add an attribute column, when each rule attribute is selected it displays an onscreen description.See attached screenshot. In BAPL-847, I will provide revised and improved help text for these descriptions to be added in the guided rule designer, which should be updated in this part of the GDT UI as well for consistency and clarity.