Changes:

• Support Kibana 7.6.1 #154
  
• Specify headers to be stored in session #147
  
• Fix: Security Multitenancy "Show Dashboard" button should redirect users to the dashboards page #143 (ported to master via #144)
  
• Fix headers whitelist to throw missing role error #137 (ported to master via #144)
  
• Fix overlay confirmation modal dialog #136 (ported to master via #144)