fix(select): blank option label throwing off alignment (#11994)
fix(select): blank option label throwing off alignment (#11994)

Fixes selecting an option that has a blank string as a label throwing off the alignment of `mat-select`.

Fixes #11969.
mmalerba/material2,Jefiozie/material2,Jefiozie/material2,jelbourn/material2,crisbeto/material2,angular/components,josephperrott/material2,angular/components,amcdnl/material2,Jefiozie/material2,crisbeto/material2,DevVersion/material2,crisbeto/material2,jelbourn/material2,andrewseguin/material2,andrewseguin/material2,amcdnl/material2,DevVersion/material2,DevVersion/material2,josephperrott/material2,andrewseguin/material2,josephperrott/material2,angular/components,jelbourn/material2,josephperrott/material2,Jefiozie/material2,jelbourn/material2,angular/components,DevVersion/material2,mmalerba/material2,andrewseguin/material2,amcdnl/material2,mmalerba/material2,amcdnl/material2,DevVersion/material2,Jefiozie/material2,jelbourn/material2,andrewseguin/material2,crisbeto/material2,josephperrott/material2,mmalerba/material2,amcdnl/material2,mmalerba/material2