- Do not render columns for non-column meta boxes. Fixed issues of displaying meta boxes for terms and users.
- Fixed meta boxes overlap each other. Fixed by settings default to 12 columns if fields don't have column settings.
- Rewrite the code to add logic to fields. Now works with complex column structure.
- Added new syntax to support multiple fields in 1 column. The syntax is similar to Meta Box Tabs extension.
- Add better check if total columns less than or greater than 12.
- Fix: use
box-sizing: border-box for columns to fix any extra padding added to the columns (especially in nested collapsible groups).
- Improvement: Make the extension safe to be included in themes/plugins.