Optimise SVG

Recently introduced SVG files contained other invisible elements (color palettes, menu and guardian logo outside hidden of the viewport of SVG files).

## Before

Metrics for common/app/assets/stylesheets/global.min.css
    Total rules: 607
    Total selectors: 855
    Average selectors per rule: 1.4
    File size: 141.59 Kb
    GZip size: 38.77 Kb

## After

Metrics for common/app/assets/stylesheets/global.min.css
    Total rules: 607
    Total selectors: 855
    Average selectors per rule: 1.4
    File size: 121.71 Kb
    GZip size: 34.37 Kb

![USA - NSA](http://www.stupidgifs.com/images/full/871.gif)