Hide user page sidebar for mobilde devices

app/views/users/show.html.haml

 .row
-  .col-md-8
+  = link_to '#aside', class: 'show-aside' do
+    %i.fa.fa-angle-left
+  %section.col-md-8
     %h3.page-title
       = image_tag avatar_icon(@user.email, 90), class: "avatar avatar-tile s90", alt: ''
       = @user.name
@@ -19,6 +21,7 @@
       = render 'groups', groups: @groups
       %hr
 
+    .hidden-xs
       .user-calendar
         %h4.center.light
           %i.fa.fa-spinner.fa-spin
@@ -33,7 +36,7 @@
               %i.fa.fa-rss
 
     = render @events
-  .col-md-4
+  %aside.col-md-4
     = render 'profile', user: @user
     = render 'projects'