* Add support for responsive embeds, and styles to makes sure wide and full videos fill available space.
* Update button style selectors, and custom colour selectors, to make sure buttons have fallback when they have colour classes from previous themes.
* Centre text, bullets in centred widgets, to match editor styles.
* Update selector for links in editor.
* Align text left/right for full-aligned latest comments widget.
* Add a max-content width for the blocks in the editor.
* Remove border radius from code block in editor.
Updated styles for a _lot_ of Gutenberg blocks:
- Alignments
- Images
- Colors
- Dropcap font size & line height
- Blockquotes
- Too many to list! (just look at the commit)
