FIX: everyone is not a visible group

app/controllers/admin/groups_controller.rb

@@ -1,7 +1,7 @@
 class Admin::GroupsController < Admin::AdminController
 
   def index
-    groups = Group.order(:name)
+    groups = Group.order(:name).where("name <> 'everyone'")
 
     if search = params[:search]
       search = search.to_s

app/models/group.rb

@@ -160,6 +160,7 @@ class Group < ActiveRecord::Base
     # the everyone group is special, it can include non-users so there is no
     # way to have the membership in a table
     if name == :everyone
+      group.visible = false
       group.save!
       return group
     end

db/fixtures/002_groups.rb

@@ -2,3 +2,4 @@ Group.ensure_automatic_groups!
 if g = Group.find_by(name: 'trust_level_5', id: 15)
   g.destroy!
 end
+Group.where(name: 'everyone').update_all(visible: false)

spec/models/group_spec.rb

@@ -154,6 +154,11 @@ describe Group do
 
   end
 
+  it "makes sure the everyone group is not visible" do
+    g = Group.refresh_automatic_group!(:everyone)
+    expect(g.visible).to eq(false)
+  end
+
   it "Correctly handles removal of primary group" do
     group = Fabricate(:group)
     user = Fabricate(:user)