Restyle admin/user page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/admin/users_controller.rb

@@ -8,7 +8,8 @@ class Admin::UsersController < Admin::ApplicationController
   end
 
   def show
-    @projects = user.authorized_projects
+    @personal_projects = user.personal_projects
+    @joined_projects = user.projects.joined(@user)
   end
 
   def new

app/views/users/_projects.html.haml

 .panel.panel-default
   .panel-heading Personal projects
   %ul.well-list
-    - @projects.each do |project|
+    - projects.each do |project|
       %li
         = link_to_project project

app/views/users/show.html.haml

@@ -13,12 +13,14 @@
       %br
       %small member since #{@user.created_at.stamp("Nov 12, 2031")}
     .clearfix
-    %h4 Groups:
-    = render 'groups', groups: @groups
-    %hr
+
+    - if @groups.any?
+      %h4 Groups:
+      = render 'groups', groups: @groups
+      %hr
     %h4 User Activity:
     = render @events
   .col-md-4
     = render 'profile', user: @user
     - if @projects.present?
-      = render 'projects'
+      = render 'projects', projects: @projects