SSP-1499 Trim whitespace in caseload search

This fix  uses the ExtJS string trim function to trim any beginning or ending whitespace from the Student Name/ID field in caseload search.
SSP-1553 Fix showHideDOB method to check for undefined column at startup

This fix adds the functionality for the show or hide DOB method to make sure the column is instantiated before changing its status. This eliminates problems at startup with IE and users who have the search functionality as their default.
NOJIRA Check for academic program field instantiation before setting values

This fix adds in a check to make sure certain fields are present in the academic program view before setting their values. This eliminates issues on login and student search for IE users that were a result of loading the main tool