- Move insertText to core
- Move styles and apply to core
- Simplify shortcut and button system
- Drop mdarea for now. In the future, we could implement the features we use (list continue, indent) in core.
- Remove admin dist (only admin setting was mdarea)
- Move inline style to css
Also fixed links, code and images in spoiler, and hopefully all other children.
The block spoiler works fine without fixes, global spoiler class causes issues.