XAFORUM-75: Add headings before entities listing
[misc] Export, Apply xar:format
XAFORUM-75: Add headings before entities listing

- topics header
XAFORUM-75: Add headings before entities listing

- forums
XAFORUM-79: Add empty state for Answers
XAFORUM-79: Add empty state for Answers
[misc] mvn xar:format
XAFORUM-79: Add empty state for Answers
XAFORUM-80: Add empty state for Topics
XAFORUM-80: Add empty state for Topics