Merge pull request #18 from alces-software/feature/sticky-navbar

Sticky navbar

Author: atoghill

app/views/partials/_navbar.html.erb

@@ -1,5 +1,5 @@
 <% if signed_in? %>
-  <nav class="navbar navbar-expand-lg navbar-dark mb-1">
+  <nav class="navbar navbar-expand-lg navbar-dark mb-1 sticky-top">
     <a class="navbar-brand" href="<%= root_path %>">
       <%= image_tag 'moosebird.png', size: '40x25', class: 'mb-1' %>
       <%= Rails.application.config.application_name %> Appliance