RCM-17 : Made date search more descriptive for program search in Cohort ...

...Builder

https://tickets.openmrs.org/browse/RCM-17

I replaced some of the in place text with some text templates (i.e spring:message).  I didn't add the other two options which were date enrolled, and date completed. The reason for that is that I'm not sure how to return the proper values from the form since all the other forms only return sinceDate and untilDate as well.