bug/text_field_trimming (wip)

added support for value trimming as the change function gets called before valuedidchange observer and thus value does not get trimmed

https://www.pivotaltracker.com/s/projects/897304/stories/57032458

__General Requirements__
- [x] Pull Request contains full description of changes
- [x] Link to the Pivotal Tracker story
- [x] Rebased against latest master branch
- [x] There are no `-1` code reviews (can only be overridden by Kyle)

---

__Coding Standards__
- [x] Style guidelines are followed, code has been formatted
- [x] Code follows idiomatic language paradigms

---

__Testing__
- [x] Test coverage has not decreased
- [x] There is no performance degradation
- [x] All appropriate automated tests are present
- [x] Appropriate seed data exists


---

__Documentation__
- [x] Major design decisions have been documented on the wiki
- [x] Deployment impact (changes required for new services, configuration, etc.)
- [x] documentation links from Pull Request

---

__UI/UX__
- [x] applicable (UI/UX has been changed)
- [x] reviewed for usability and design
- [x] functions on 1024*768 browser size
- [x] works on IE8

***
---