#JC-1725 fix w3c errors in banner tag
#JC-1721 removed Close tags button. fix preview in PM
#JC-1522 remove hot key text from review and add focus to body after back from review
Merge branch 'JC-1725.w3c_errors' into JC-1522.remove_hotkey_from_preview
Merge branch 'JC-1721.remove_close_tags_button' into JC-1522.remove_hotkey_from_preview
#JC-1735 do highlight code in preview
#JC-1317 if parent not null and prettify container is child of parent than do Prettify. If parent == null then do prettify to all pretttify container
Merge remote-tracking branch 'origin/JC-1735.code_lines_number_in_preview'