fix(list): improved image scaling in avatar (#12660)
fix(list): improved image scaling in avatar (#12660)

Improves the scaling for list avatar images that aren't exact squares.

Fixes #8131.
DevVersion/material2,DevVersion/material2,jelbourn/material2,angular/components,andrewseguin/material2,crisbeto/material2,angular/components,josephperrott/material2,Jefiozie/material2,mmalerba/material2,mmalerba/material2,mmalerba/material2,DevVersion/material2,josephperrott/material2,angular/components,angular/components,jelbourn/material2,mmalerba/material2,mmalerba/material2,crisbeto/material2,jelbourn/material2,crisbeto/material2,andrewseguin/material2,Jefiozie/material2,josephperrott/material2,DevVersion/material2,DevVersion/material2,Jefiozie/material2,josephperrott/material2,andrewseguin/material2,andrewseguin/material2,andrewseguin/material2,Jefiozie/material2,jelbourn/material2,Jefiozie/material2,crisbeto/material2,jelbourn/material2,josephperrott/material2