BUG 11093 'Delegated Date' in Advanced Search, doesn't work if you set 'Date From' equals 'Date To'.

Was added a validation to search by 'Delegated Date' using the same 'Date From' and 'Date To' fields.
Merge pull request #1505 from Jennydmz/BUG-11093

BUG 11093 'Delegated Date' in Advanced Search, doesn't work if you set 'Date From' equals 'Date To'.