Fixed display of WET theme SVG logos for RTL. Fixed display of SVG logos in GCWU intranet mobile view. Implemented extends/placeholders for multiple SCSS files.
Fix to GCWU intranet SVG icons in mobile view. More extends/placeholders in SCSS. Changed pe. to _pe. where feasible.
Merge pull request #1551 from pjackson28/master

Numerous fixes