## Description

Fixes #1245

## Additional information

* The fix from #1224 asks that all accordions on a page start as
expanded either by omitting `aria-hidden` or by setting it to `false`.
* The accordions on pages beyond the “Accordions” and “Visual style”
pages are for “Documentation” blocks, which are expanded by default.
* This PR removes `aria-hidden` from all accordion content blocks,
demonstrating the application of the #1224 fix. Modifications to other
pages should not be necessary beyond that required by the clean and
semantic milestone.

## Description

Fixes #346

## Additional information

* This PR uses `display: inline-block` to allow setting height and
width to an inline element.
* Uses 44 pixels for both height and width per the Apple iOS HIG
* Concerns with `text-align: right` - could result in thumb hitting to
the right of the hit area - actually hitting the icon to the right of
the actual target. `text-align: center` used instead.
* Using `text-align: center` causes the right alignment of the icons to
be off when compared “Agency Contact Center” text. `position: relative;
left: 13px` used in order to compensate. Slight concern that this could
cause a horizontal scroll bar to appear on mobile - though, given the
overall alignment of the `social-links` container - concern may be moot.

[Forms]: Remove max-width on form element, move to class

…nfig folder.

[Typography]: Remove inaccessible text links

[Pull request template]: Add checklist section to pull request template

…ea-flexible

[Footer]: Fix footer social icon hit area - flexible

[UI components]: Fix scss-lint warnings

[UI components]: Split up components structure

Remove full GitHub URL from links in CONTRIBUTING file

Fixes casing, adds link to CC0 dedication

Updating files for v0.9.5 release