Make the chip suggestions look & behave like a material select in angular 1

[thekalinga]

Bug Report

1. Currently chips suggestion dropdown looks complete off from the actual material spec
2. The backspace/left arrow does not select the previous item in the list + left & right arrow navigation does not work
3. Searching does not auto select the first item
4. Within the already selected chips, using arrow/click if you select a chip, delete button should delete the chip & make it available in the autocomplete

What is the expected behavior?

The suggestions should look & behave like material select in angular1

What is the motivation / use case for changing the behavior?

To keep it consistent with material style. The demo can be found here https://material.angularjs.org/latest/demo/chips

[emoralesb05]

The reason it looks complete off from the actual material spec its because its a native datalist, we are currently waiting on material to use the md-autocomplete.

Once md-autocomplete is released, we are gonna revisit and polish the chips module and take into consideration the a11y enhancements mentioned in 2 and 4.

There has already been mentions here:
#215 and #165

[thekalinga]

Should I close this/keep it open?

[kyleledbetter]

We'll close this since it's coming. Track their progress here https://github.com/angular/material2/projects/7