Disable disconnecting NeoPass if no password/email is set

Just as a precautionary thing! Seems polite.

app/assets/stylesheets/partials/clean/_mixins.sass

@@ -41,17 +41,19 @@
   padding: .5em .75em .45em
   color: #fff
   text-decoration: none
-  -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5)
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5)
-  -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5)
   text-shadow: 0 -1px 1px rgba(0, 0, 0, 0.25)
   border-bottom: 1px solid rgba(0, 0, 0, 0.25)
   position: relative
   font-weight: bold
   line-height: 1
-  &:hover
+  &:hover:not(:disabled)
     color: #fff
-  &:active
+  &:active:not(:disabled)
     transform: translateY(1px)
+  &:disabled
+    background: #999999 image-url("alert-overlay.png") repeat-x
+    cursor: not-allowed
 
 =reset-awesome-button
   border-radius: 0

app/models/auth_user.rb

@@ -48,6 +48,10 @@ class AuthUser < AuthRecord
     neopass_email || uid
   end
 
+  def uses_password?
+    encrypted_password?
+  end
+
   def disconnect_neopass
     # If there's no NeoPass, we're already done!
     return true if !uses_neopass?

app/views/devise/registrations/edit.html.erb

@@ -75,8 +75,23 @@
         you can still use "Forgot your password?" to recover your Dress to
         Impress account, using the Email saved in "Your info".
       </p>
+      <% if !resource.uses_password? && !resource.email %>
+        <p>
+          You can't remove this NeoPass yet, because you need to either set a
+          password or a recovery email first. (Ideally both!)
+        </p>
+      <% elsif !resource.uses_password? %>
+        <p>
+          Be extra careful here! Your account doesn't have a password set.
+        </p>
+      <% elsif !resource.email? %>
+        <p>
+          Be extra careful here! Your account doesn't have an email set.
+        </p>
+      <% end %>
     </section>
-    <%= form.submit "Disconnect your NeoPass" %>
+    <%= form.submit "Disconnect your NeoPass",
+        disabled: !resource.uses_password? && !resource.email? %>
   <% end %>
 <% end %>