Use native ES5 Array prototype methods instead of jQuery

Replace

• $.each( array, function ( index, value ) { ... } ) by array.forEach( function ( value, index ) { ... } )

• $.grep( array, function ( value ) { ... } ) by array.filter( function ( value ) { ... } )

• $.map( array, function ( value ) { ... } ) by array.map( function ( value ) { ... } )

This change is a follow-up to 9d67e9973e6766e057c70ea8c811be8e269fb80a.

Change-Id: I8ef9af8c4d2f440faca65ec7c78a977ea7c31ad2