Bottom margin resetting for p element is creating problems

Problem/Motivation

In https://cgit.drupalcode.org/bs_base/commit/?id=12edc71 we normalized margin handlings for some basic HTML elements to have the same bottom margins as p element.

But we also removed bottom margin for these elements (including p element) when they are the last child:

p, ul, ol, dl, pre, blockquote {
  &:last-child {
    margin-bottom: 0;
  }
}

Visual tests show that at least resetting of a p element does not look that good. Maybe the same is true for other elements?

Proposed resolution

Let's remove the bottom margin reset for now and see how this will behave.