[bug 1110543] Add noscript section

Adding the <noscript> section to both the generic_feedback.html and picker.html templates allows the message to stay displayed when the user picks a product without JavaScript being enabled.
Instead of putting the url in the string to be translated, we use a `{% trans %}` block and make the url a variable. That way localizers don't have to worry about mistyping it plus we can change it later without having to re-translate strings.

Also, you want to nix the `en-US` part of the url. That'll get added when the user goes to that url, but it'll add the locale they want to see. If you hard-code the `en-US` part, then all users will go to `en-US`.