app/assets/images/add.svg
<?xml version="1.0" ?><!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.1//EN' 'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'><svg enable-background="new 0 0 512 512" height="512px" id="Layer_1" version="1.1" viewBox="0 0 512 512" width="512px" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g><path d="M256.108,3.02c-139.743,0-253,113.257-253,253s113.257,252.995,253,252.995 c139.743,0,253-113.252,253-252.995S395.852,3.02,256.108,3.02z M256.108,488.775c-128.338,0-232.76-104.417-232.76-232.755 c0-128.339,104.422-232.76,232.76-232.76c128.338,0,232.76,104.421,232.76,232.76C488.868,384.358,384.446,488.775,256.108,488.775 z" fill="#37404D"/><polygon fill="#37404D" points="266.228,104.22 245.988,104.22 245.988,245.9 104.98,245.9 104.98,266.14 245.988,266.14 245.988,407.148 266.228,407.148 266.228,266.14 407.908,266.14 407.908,245.9 266.228,245.9 "/></g></svg>