* improved the popup page 'EditHistoryData.html':
  o improvd page styles;
  o updated related view: 'indicator.views.indicator_edithistorydata()';
  o updated related css styles;
  o added styles 'valid' and 'invalid';
  o added 'jquery-ui: datepicker' to select date;
  o added 'reason_input' field to get the reason for modification;
  o implemented validation for 'date' and 'reason' field;

* added testing record data for testing 'detail_card';
* added 'cursor: pointer' for 'ui-datepicker-trigger';
* small style change to the 'see_more_button' of SheetDefault.html;
* added umcompressed 'jquery-1.9.1.js' for backup;
* added param 'type' for 'indicator.tools.format_data()';

TODO:
EditHistoryData.html:
  o to show original record data properly;
  o to add validation for data field
  o to implement ajax POST data and related view