Enable X-FRAME-Options header to implement clickjacking protection

panel:bgColor=e7f4fa NOTE: This suggestion is for JIRA Server. Using JIRA Cloud? See the corresponding suggestion|http://jira.atlassian.com/browse/JRACLOUD-25143. panel TLDR: Add X-FRAME-Options: SAMEORIGIN to all HTTPS pages server config, and test that nothing breaks. --- Description: Current...