add options for setting maxWidth of label and value in NumberControl, phetsims/scenery-phet#191, phetsims/hookes-law#29
add options for setting maxWidth of label and value in NumberControl, phetsims/scenery-phet#191, phetsims/hookes-law#29

phetsims/scenery-phet,phetsims/scenery-phet,phetsims/scenery-phet