TMF-4405: DocTypePicker explicitly opts out of KendoComboBox's "filter" feature
TMF-4405: DocTypePicker explicitly opts out of KendoComboBox's "filter" feature

First, I had to change it to an immutable prop from a local constant.
Other clients that depended on filter being set to "startswith",
_should_ continue to work.

(http://jira/browse/TMF-4405)

wingspan/wingspan-forms,tshelburne/wingspan-forms,0111001101111010/wingspan-forms