docs(input): document the `md-select-on-focus` directive.
docs(input): document the `md-select-on-focus` directive.

Closes #7124

Closes #7271

angular/material,acoreyj/material,ServiceManagementGroup/material,bluebirdtech/material,welkinhealth/material,programmist/material,profoundry-us/material,gkalpak/material,pwistbac/material,HarrisCorp/material,crisbeto/material,Frank3K/material,imjoeco/material,Frank3K/material,hayloft/material,SamDLT/material,HipsterZipster/material,epelc/material,ErinCoughlan/material,miguelcobain/material,DevVersion/material,clshortfuse/material,ErinCoughlan/material,programmist/material,crisbeto/material,HarrisCorp/material,miguelcobain/material,DevVersion/material,gmoothart/material,graingert/material,pwistbac/material,jadjoubran/material,vertazzar/material,bluebirdtech/material,Frank3K/material,DerekLouie/material,jadjoubran/material,Splaktar/material,DevVersion/material,oostmeijer/material,ErinCoughlan/material,dmitriz/material,welkinhealth/material,gkalpak/material,clshortfuse/material,epelc/material,colinskow/material,dmitriz/material,marekmicek/material,epelc/material,SamDLT/material,ServiceManagementGroup/material,profoundry-us/material,crisbeto/material,imjoeco/material,acoreyj/material,j3ski/material,crisbeto/material,imjoeco/material,gkalpak/material,vertazzar/material,gkalpak/material,oostmeijer/material,daniel-nagy/material,miguelcobain/material,j3ski/material,ErinCoughlan/material,marekmicek/material,HarrisCorp/material,hodeyp/material,gmoothart/material,epelc/material,robertmesserle/material,ilovett/material,hayloft/material,HipsterZipster/material,jadjoubran/material,hodeyp/material,welkinhealth/material,angular/material,angular/material,HipsterZipster/material,david-gang/material,colinskow/material,hayloft/material,colinskow/material,ServiceManagementGroup/material,ilovett/material,colinskow/material,marekmicek/material,david-gang/material,DerekLouie/material,HipsterZipster/material,profoundry-us/material,pwistbac/material,robertmesserle/material,oostmeijer/material,daniel-nagy/material,gmoothart/material,acoreyj/material,DevVersion/material,pwistbac/material,jelbourn/material,graingert/material,Splaktar/material,ServiceManagementGroup/material,david-gang/material,welkinhealth/material,vertazzar/material,j3ski/material,ilovett/material,daniel-nagy/material,bluebirdtech/material,DerekLouie/material,DerekLouie/material,programmist/material,Frank3K/material,jelbourn/material,ilovett/material,Splaktar/material,robertmesserle/material,robertmesserle/material,vertazzar/material,profoundry-us/material,j3ski/material,hodeyp/material,imjoeco/material,graingert/material,acoreyj/material,clshortfuse/material,clshortfuse/material,miguelcobain/material,SamDLT/material,Splaktar/material,dmitriz/material,oostmeijer/material,programmist/material,graingert/material,SamDLT/material,daniel-nagy/material,david-gang/material,jelbourn/material,jadjoubran/material,hodeyp/material,angular/material,hayloft/material,marekmicek/material,jelbourn/material,bluebirdtech/material,HarrisCorp/material,gmoothart/material,dmitriz/material