Improve external users feature

app/finders/projects_finder.rb

@@ -47,9 +47,9 @@ class ProjectsFinder
        group.shared_projects.visible_to_user(current_user)
     ]
     if current_user.external?
-      user_group_projects.push(group.projects.public_only)
+      user_group_projects << group.projects.public_only
     else
-      user_group_projects.push(group.projects.public_and_internal_only)
+      user_group_projects << group.projects.public_and_internal_only
     end
   end

app/views/admin/users/_form.html.haml

@@ -65,7 +65,7 @@
       .form-group
         = f.label :external, class: 'control-label'
         .col-sm-10= f.check_box :external
-        .col-sm-10 External users can not see internal or private projects unless access is explicitly granted. Also, external user can not create projects or groups.
+        .col-sm-10 External users cannot see internal or private projects unless access is explicitly granted. Also, external users cannot create projects or groups.
     %fieldset
       %legend Profile

app/views/admin/users/index.html.haml

@@ -74,12 +74,14 @@
       %li
         .list-item-name
           - if user.blocked?
-            %i.fa.fa-lock.cred
+            = icon("lock", class: "cred")
           - else
-            %i.fa.fa-user.cgreen
+            = icon("user", class: "cgreen")
           = link_to user.name, [:admin, user]
           - if user.admin?
             %strong.cred (Admin)
+          - if user.external?
+            %strong.cred (External)
           - if user == current_user
             %span.cred It's you!
         .pull-right