Unit creation is missing autofill / autocompletion for addresses

[kaihendry]

We should be using auto complete HTML features to help improve the quality of the Unit addresses in the Unit creation form. This basically allows the browser to have a go at autofilling the fields, which can save a lot of key strokes.

Example of it working https://config.webconverger.com/quote/

Canonical reference: https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#autofilling-form-controls:-the-autocomplete-attribute

[kaihendry]

Also "Administrative Region" should probably come before Country.