Wagtail wish list: Reduce vertical space around table element

[dorothyyeager]

Summary

What we are after:
Right now there is a little too much space around the table element. We would like to have less white space.

(The article this screenshot comes from is at https://www.fec.gov/updates/march-25-webinar-candidate-committees-2020/.)

Completion criteria

• The vertical space between tables and other elements on the page should follow visual patterns from elsewhere on the site and the pattern library.
• The pattern library should specify the updates if needed

Future work

[johnnyporkchops]

We can add :

.body-block.block-paragraph + .body-block.block-table {
    margin-top: -4rem;
}

To accommodate for the default margin below body-block.block-paragraph when .a table block follows.
We could also add something for a table-block following another table-block but the spacing in the original screenshot seems like the expected separation between content blocks. Thoughts?