Added new format and field option processing
in kDateFormatter::Format method.
Added new format usage in the inp_edit_date_time block in the adm.console.

Part 1 - regression testing

1. go to Configuration → Website → Scheduled Tasks section
2. click on "Add" button
3. confirm that form opens and "Next Run On" field is empty
4. click on date picker icon
5. confirm that picker opens and contains current date and time
6. pick some date
7. confirm that picker closes and chosen date placed in the input field
8. click on date picker icon
9. confirm that picker opens and contains previously picked date and time
10. save changes
11. open added scheduled task for editing
12. confirm, that previously entered date is displayed
13. open date picker
14. confirm, that entered previously date is displayed in date picker

Part 2 - new ability testing - repeat with relative value like 'midnight' and with exact time like '12/31/2015' as picker_default option value

1. edit scheduled_tasks_config.php file - add 'picker_default' => 'midnight' option to the NextRunOn field configuration
2. go to Configuration → Website → Scheduled Tasks section
3. click on "Add" button
4. confirm that form opens and "Next Run On" field is empty
5. click on date picker icon
6. confirm that picker opens and contains current date, but midnight time
7. pick some date
8. confirm that picker closes and chosen date placed in the input field
9. click on date picker icon
10. confirm that picker opens and contains previously picked date and time
11. save changes
12. open added scheduled task for editing
13. confirm, that previously entered date is displayed
14. open date picker
15. confirm, that entered previously date is displayed in date picker