Slide out tab SCSS: Moved placeholder selector declaration into @media screen type.
Resolves SASS deprecation warnings when building.
Merge pull request #2947 from EricDunsworth/v3.1-slideout-placeholder-location

Slide out tab SCSS: Moved placeholder selector declaration into @media screen type.
Themes: Fixed terms and conditions comment in the SVG files.
Merge pull request #2948 from pjackson28/fixsvgterms

Themes: Fixed terms and conditions comment in the SVG files.