Block quote styles

[benlk]

Changes

• Matches the default styles for Gutenberg's Pull Quote Quote block with Largo's styles for <blockquote>. Adds styles for <cite> elements.
• Ensures that the CSS classes used by Largo's Classic Editor plugin "Module Wrapper" can be used on pull quotes. If you'd like to make use of these classes by adding them to a Pull Quote block in the "Additional CSS Class" control of the "Advanced" section of the pull quote's block settings, the list of classes is as follows:
  • type-pull-quote: appears larger in the story, with a slightly fancier presentation
  • type-aside: appears smaller, without decoration
  • alignleft: block is aligned left. This class may make it impossible to select the block in the editor with your mouse, requiring use of the keyboard to move the cursor into the block.
  • alignright: block is aligned right. This class may make it impossible to select the block in the editor with your mouse, requiring use of the keyboard to move the cursor into the block.
  • aligncenter: block is aligned center.
  • half: Block is half the width of the column at all but the smallest screen widths.

For #1682, but does not close it. We'll want to register block style variations for the Quote block eventually.

[benlk]

Correction: This did not update the styles for Gutenberg's Pull Quote Block. This updated the styles for Gutenberg's Quote Block, which are separate things. The discrepancy will be remedied in #1699