Change "title" field for adding a new contact method

[alsomanya]

The "title" field on the new contact method is confusing. A PO suggested we change the input to "Label" and give an example, so it's clearer what we're asking (he thought "title" referred to Dr., Mr., Mrs., etc).

We could simply do this UI improvement, or we could make the UX of adding a contact method a little easier. For example, we could auto-fill the label based on the contact method type (i.e. the field is pre-filled "Joe's Cellphone"), and a PO can edit the label if he/she wants.