tagging inputs with no choices displayed as search field

[torstenrudolf]

Bug description:

The fix for #991 (see commit #48cf1ba42b2a50a4b2e28eb6e734020500ce25d5) sets all inputs to type="search".
While this is good for the search fields of the dropdowns with a list of choices it is wrong behaviour when using ui-select for tagging fields with no choices. They should be of type text I believe.

The problem is that mobile keyboards display the enter button as magnifier because of this.

Link to minimally-working plunker that reproduces the issue:

see any tagging example with latest code:
http://plnkr.co/edit/zLePmYVcoC9gcV4pGToZ?p=preview

Version

UI-Select: 0.17.0