r2.0.5

1. optimize: ticket list api performance when ticket's participant is multiple
2. bug fix: workflow detail page display error when notice is none
3. bug fix: repeated json.stringify when edit custom field or state
4. bug fix: can not del user's department
5. bug fix: multi select type field can not summit
6. bug fix: select field display wrong in ticket detail
7. feature: ticket detail page support richtext field type