Provide margins to Latest Posts excerpts

[kjellr]

Addresses part of #15722.

#14627 added the option for users to display post excerpts and full content to posts within the Latest Posts block. It did not include any styles for that content. This means that excerpts will generally bump up against each other like so:

This PR adds some top and bottom margin to the excerpt to prevent this visual issue:

The style is entered into editor.scss so that it's visible in the editor, and to themes that opt-in to opinionated styles. If there's an appetite for it, this could alternatively be included in style.scss instead, so that the margin is supplied by default in all themes. I'm all for that, but figured we can have a discussion here first.

[kjellr]

Oh, also: It's worth noting that the styles in this PR will not be picked up in the front end today, even if the theme opts into the opinionated styles. That's because the classname for the excerpt is different between the front and back end. More details in #15758.

[jasmussen]

Nice.

First off, I wonder if #15758 should be fixed first, it feels like this one would matter more if that one lands first. And similarly if/when that happens, perhaps these styles are more appropriate in style.scss or theme.scss?

[kjellr]

First off, I wonder if #15758 should be fixed first, it feels like this one would matter more if that one lands first. And similarly if/when that happens, perhaps these styles are more appropriate in style.scss or theme.scss?

Yep, #15758 has been merged in, so I think we're all good there.

I've moved these to style.css in 1c996c7. I think this is the right place for it personally — It's easy to override, and without the margin it appears broken.

[jasmussen]

I'm personally 👍👍 on this.

[kjellr]

Cool, thanks. I'll merge this in for now then. 🙌