Update the cookies disabled copy

issue #1167

resources/static/common/js/error-messages.js

@@ -56,7 +56,7 @@ BrowserID.Errors = (function(){
     },
 
     cookiesDisabled: {
-      title: gettext("Persona requires cookies"),
+      title: gettext("Persona requires cookies to remember you and make signing in easier."),
       message: format(gettext("Please close this window, <a %s>enable cookies</a> and try again"), [" target='_blank' href='" + enableCookiesURL + "'"])
 
     },

resources/static/dialog/views/error.ejs

@@ -11,9 +11,9 @@
     </h2>
   <% } else if (typeof network !== "undefined" && network.status == 403) { %>
     <h2 id="error_403">
-      <%= gettext("Persona requires cookies") %>
+      <%= gettext("Persona requires cookies to remember you and make signing in easier.") %>
     </h2>
-    <%= format(gettext("Please close this window, <a %s>enable cookies</a> and try again"), [" target='_blank' href='http://support.mozilla.org/en-US/kb/Websites%20say%20cookies%20are%20blocked'"]) %>
+    <%= format(gettext("Please close this window, <a %s>enable cookies</a> and try again"), [" target='_blank' href='http://support.mozilla.org/kb/Websites%20say%20cookies%20are%20blocked'"]) %>
   <% } else if(typeof title === "string") { %>
     <h2>
       <span class="emphasis"><%= title %></span>

resources/views/cookies_disabled.ejs

@@ -6,7 +6,7 @@
       <div class="table">
         <div class="vertical contents">
           <h2 id="reason">
-            <%= gettext("Persona requires cookies") %>
+            <%= gettext("Persona requires cookies to remember you and make signing in easier.") %>
           </h2>
 
           <p>