Bug description:

When tagging is active, when you type a new item, the tagging-label text is included when you click the item in the dropdown.

Below plunker taken from examples, type in 'Test' and then click on 'Test (custom 'new' label)' and an item will be created that includes 'Test (custom 'new' label)' instead of the expected 'Test'

Note: hitting tab after typing a new entry does not include the tagging-label text.

Link to minimally-working plunker that reproduces the issue:

http://plnkr.co/edit/Qkt7EoCAdtDflXxr5TKO

Version of Angular, UI-Select, and Bootstrap/Select2/Selectize CSS

Angular: 1.5.8

UI-Select: 0.19.4

Bootstrap/Select2/Selectize CSS (if applicable): 3.3.7 / 4.0.3 / NA