fix(chips): use all available space for the input (#7462)
fix(chips): use all available space for the input (#7462)

Currently, an input inside a chips list is limited to 150px, so it looks like this.

![Cutoff Name](https://user-images.githubusercontent.com/1882729/31061451-6eb3a072-a6d6-11e7-9dac-67b41d1d3087.png).

Adding flex lets the input use all available space and still wrap correctly.

![Using all avaible space](https://user-images.githubusercontent.com/1882729/31061470-a0e783d8-a6d6-11e7-8919-848e1c4cb10a.png)

![Wrapping](https://user-images.githubusercontent.com/1882729/31061487-cdbfb10a-a6d6-11e7-89c9-a5fe1cf38c41.png)
fairfaxmedia/material2,amcdnl/material2,crisbeto/material2,DevVersion/material2,tinayuangao/material2,mmalerba/material2,crisbeto/material2,angular/components,mmalerba/material2,andrewseguin/material2,amcdnl/material2,angular/components,fairfaxmedia/material2,andrewseguin/material2,josephperrott/material2,emoralesb05/material2,ppham27/material2,tinayuangao/material2,fairfaxmedia/material2,andrewseguin/material2,ppham27/material2,ppham27/material2,josephperrott/material2,jelbourn/material2,emoralesb05/material2,amcdnl/material2,emoralesb05/material2,crisbeto/material2,josephperrott/material2,josephperrott/material2,willshowell/material2,angular/components,Eddman/material2,mmalerba/material2,jelbourn/material2,DevVersion/material2,DevVersion/material2,ppham27/material2,tinayuangao/material2,willshowell/material2,Eddman/material2,willshowell/material2,Jefiozie/material2,andrewseguin/material2,Jefiozie/material2,amcdnl/material2,willshowell/material2,Jefiozie/material2,jelbourn/material2,ppham27/material2,Eddman/material2,fairfaxmedia/material2,jelbourn/material2,Eddman/material2,tinayuangao/material2,Eddman/material2,emoralesb05/material2,DevVersion/material2,jelbourn/material2,amcdnl/material2,DevVersion/material2,angular/components,tinayuangao/material2,fairfaxmedia/material2,Jefiozie/material2,Jefiozie/material2,josephperrott/material2,crisbeto/material2,mmalerba/material2,willshowell/material2,mmalerba/material2,emoralesb05/material2,andrewseguin/material2