Map height can set `vh`

The height can set to vh,so map’s height can determine by others.
change this code,

public function set_height($height) {
if (preg_match(‘/(\d*)(px|vh)/’, $height)){
$this->height = $height;
}
else {
_e(‘<div class=”notice notice-error is-dismissible”><p>only valid height in px|vh is allowed like: 300px </p></div>’);
exit;
}
}