Small bugfix release.

Replace the following files/snippets:

• Replace: assets/css/* files
• Replace: assets/scss/core/_forms.scss
• Replace: Fix input-group-btn usage throughout: replace all shop .html files, all one pager .html files, 404.html, features.html, elements-icons.html, header-bottom.html & index-promo-header.html

Changes:

• BUGFIX: Shop quantity widget fix on mobile
• BUGFIX: Fix input-group-btn usage throughout