removed test-digest-button for Users other than Admins and Moderators (…

…publiclab#4293)

* removed test-digest-button from production environment

* added space between conditionals

* improved code readability

* indented tags

* corrected error in conditional statement

* restricted the Test-Digest-Button to be viewed by Admins and Mods only regardless of the ENV

* changed the style of the test button to btn-primary like all the other buttons

* added a space between conditionals and tags

* removed redundant if statement

* adding && current_user.can_moderate?

* removed extra spaces to make code cleaner

* Button size changed

app/views/users/profile.html.erb

@@ -234,9 +234,10 @@
     </div>
   <% end %>
 
-  <% if @profile_user && current_user && @profile_user == current_user %>
+  <% if @profile_user && current_user && current_user.can_moderate? && @profile_user == current_user %>
+    <br />
     <%= form_tag "/users/test_digest_email", method: :post do %>
-      <%= submit_tag "Test Digest Email" %>
+      <%= submit_tag "Test Digest Email", class: "btn btn-info", style: "width: 100%;" %>
     <% end %>
   <% end %>