Add 'popup requires key' option

options.html

@@ -10,6 +10,7 @@
 <div class=panel>
 <!-- target=_blank prevents firefox mobile from opening the link inside the about:addons page and hitting a CSP error -->
 <p>View the tutorial <a href="https://github.com/wareya/nazeka/blob/master/tutorial.md" target="_blank">here!</a></p>
+<p>Do you want an option that isn't here? Post a request on the <a href="https://github.com/wareya/nazeka/issues" target="_blank">issue tracker</a>.</p>
 
 <form name=optform>
 <div id=optionsection>