Some mild updates required to the style page on Breadcrumbs

[mbgower]

On the Style page, some of the information may need attention.

Under Color, there is a series of images showing state appearance

• The Focus state should have both a focus indicator and a blue underline
• I don't think the Active image should exist. isn't the "Current page" the same as active? And I can't think of a situation where you'd have an underlined non-interactive element.

Under Truncated breadcrumbs, the page states:

Truncated breadcrumbs are not currently built into the breadcrumb component

It's unclear if this means that a page link (i.e., page name that is a breadcrumb link) is never truncated. There are no illustrations. This sentence is then followed by a comment on the overflow menu, which can either be interpreted as a further puzzling comment on the first sentence, or a related topic about where not all breadcrumbs are shown (truncating the number of links listed, as opposed to truncating a portion of a single link name). The guidance needs to be clarified.

Under the Structure section, there is an image of an expanded breadcrumb overflow menu, which lacks a focus indicator on the first item (Breadcrumb 2) in the expanded list. This is the same issue (but different page) identified in #2815