[ShikiSuen] CSCN Anniversary theme 2.2.13a

Sync updates introduced in XenForo 2.2.13 Golden Master.

• Expanded LESS coverage of certain data templates.
• Fixed some LESS compatibility issues with Truonglv's Post Reply addon.
• Fixed some LESS compatibility issues with XFES.
• Fixed some LESS compatibility issues with CV6's NodeIcon addon.

Disclaimer: My XenForo license is expired, but we do have official free access to XenForo demo sites (which has time limits). I finished the theme update procedures by using an XF official demo site.

Templates manually updated for XF 2.2.9 Golden Master.

• A content-check has been added to forum_view template.
• Add a background color to @-quoted usernames in posts. (crediting Brogan for his idea.)

No other new function added.

• Templates manually updated for XF 2.2.6 Stable Release. No new function added.