OO-2827: Icon for the blog menu entry "Quota"

src/main/webapp/static/themes/light/modules/_icons.scss

@@ -208,6 +208,7 @@ $fa-css-prefix: "o_icon" !default;
 .o_icon_provider_shibboleth:before { content: $fa-var-university;}
 .o_icon_provider_twitter:before { content: $fa-var-twitter;}
 .o_icon_publish:before { content: $fa-var-share;}
+.o_icon_quota:before { content: $fa-var-database;}
 .o_icon_qrcode:before { content: $fa-var-qrcode;}
 .o_icon_quickview:before { content: $fa-var-eye;}
 .o_icon_radio_off:before { content: $fa-var-circle-o;}