Bug 11563: (follow-up) add noEnterSubmit class to pulldowns

Bug 11563: (follow-up) add noEnterSubmit class to pulldowns

When using Chrome on Mac OS X, form submits are triggered by hitting
enter when focused on a select. This is not an issue with any other
combination of browser and operating system that I am aware of.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Christopher Brannon <cbrannon@cdalibrary.org>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>