Added helper function for Sisense URL display on Eng handbook pages and...

Added helper function for Sisense URL display on Eng handbook pages and renamed the Periscope to Sisense 

source/includes/_performance_indicator.erb

@@ -19,8 +19,17 @@
   </ul>
 <% end %>
 
+<% if performance_indicator.sisense_url %>
+  <b> Sisense URL(s)</b>
+  <ul>
+  <% performance_indicator.sisense_url.each do |url| %>
+    <li><a href="<%= url %>"><%= Sisense↗ %></a></li>
+  <% end %>
+  </ul>
+<% end %>
+
 <% if performance_indicator.periscope_data %>
-  <b>Chart</b><% if performance_indicator.periscope_data.chart && performance_indicator.periscope_data.dashboard%> (<a href="https://app.periscopedata.com/app/gitlab/<%= performance_indicator.periscope_data.dashboard %>/?widget=<%= performance_indicator.periscope_data.chart %>">Periscope↗</a>)<% end %>
+  <b>Chart</b><% if performance_indicator.periscope_data.chart && performance_indicator.periscope_data.dashboard%> (<a href="https://app.periscopedata.com/app/gitlab/<%= performance_indicator.periscope_data.dashboard %>/?widget=<%= performance_indicator.periscope_data.chart %>">Sisense↗</a>)<% end %>
   <% if ENV['PERISCOPE_EMBED_API_KEY'] %>
   <embed width="100%" height="100%" style="min-height:300px;" src="<%= signed_periscope_url(performance_indicator.periscope_data) %>">
   <% else %>