Fix - Bugs:#3802 Datepicker displayed just the first time

Fixed the bug that was preventing the datepicker from displaying after
ajax call. datepicker remained initialized while its content was
replaced by the ajax response. tbl_change.js now reinitializes
datepicker everytime its loaded.
Indentation fix
Merge pull request #155 from ayushchd/master

Pull request for bugs:#3802 Datepicker displayed just the first time