publicbookings_help adds <p> tags even if no help text is generated

Current Behavior: publicbookings_help is adding

tags. This results is a none empty $helptext value (which causes the $$helptext variable to print), even if no help text is generated.

Expected Behavior: $helptext should only be populated if there is help text.

Solution: Either remove the offending

tags from the output, or make them conditional so they only get added if there is help text.