Update _manage_form.htm

fix form title for update context
Added form widget "TimePicker" to Backend.
Added form widget "TimePicker" to Backend.
Merge pull request #795 from webmaxx/develop

Added form widget "TimePicker" to Backend.
Refs #795: Combine TimePicker and DatePicker
Refs #795 - Fixes set values for datetime
Fixes display values for datetime