## 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

Merging v0.9.5 updates into release branch.