Update loader for Firefox (#474)

less/fuelux-override/loader.less

@@ -1,3 +1,4 @@
 .fuelux .loader {
 	color: @loader-color;
+	background-image: url('data:image/svg+xml;charset=US-ASCII,%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22UTF-8%22%20standalone%3D%22no%22%3F%3E%3Csvg%20width%3D%2264px%22%20height%3D%2264px%22%20viewBox%3D%220%200%2064%2064%22%20version%3D%221.1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Axlink%3D%22http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%22%3E%20%20%3Cg%20width%3D%2254px%22%20height%3D%2254px%22%20viewBox%3D%225%205%2054%2054%22%20%20id%3D%22loader%22%20stroke%3D%22none%22%20stroke-width%3D%221%22%20transform%3D%22translate%285.000000%2C%205.000000%29%22%20fill%3D%22%231589ee%22%3E%20%20%3Cg%20id%3D%22spinner-medium%22%3E%20%20%20%3Cg%20id%3D%22Oval-35%22%3E%20%20%20%20%3Ccircle%20id%3D%22Top%22%20cx%3D%2227%22%20cy%3D%226%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%20%3Ccircle%20id%3D%22TopRight%22%20cx%3D%2248%22%20cy%3D%2217%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%20%3Ccircle%20id%3D%22BottomRight%22%20cx%3D%2248%22%20cy%3D%2236%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%20%3Ccircle%20id%3D%22Bottom%22%20cx%3D%2227%22%20cy%3D%2248%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%20%3Ccircle%20id%3D%22BottomLeft%22%20cx%3D%226%22%20cy%3D%2236%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%20%3Ccircle%20id%3D%22TopLeft%22%20cx%3D%226%22%20cy%3D%2217%22%20r%3D%225%22%3E%3C%2Fcircle%3E%20%20%20%3C%2Fg%3E%20%20%3C%2Fg%3E%20%3C%2Fg%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23Top%22%20path%3D%22M%200%200%20V%20-5%20Z%22%20dur%3D%220.25s%22%20begin%3D%220s%3B%20TopLeftAnim.end%22%20id%3D%22TopAnim%22%20%2F%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23TopRight%22%20path%3D%22M%200%200%20L%205%20-5%20Z%22%20dur%3D%220.25s%22%20begin%3D%22TopAnim.end%22%20id%3D%22TopRightAnim%22%20%2F%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23BottomRight%22%20path%3D%22M%200%200%20L%205%205%20Z%22%20dur%3D%220.25s%22%20begin%3D%22TopRightAnim.end%22%20id%3D%22BottomRightAnim%22%20%2F%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23Bottom%22%20path%3D%22M%200%200%20V%205%20Z%22%20dur%3D%220.25s%22%20begin%3D%22BottomRightAnim.end%22%20id%3D%22BottomAnim%22%20%2F%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23BottomLeft%22%20path%3D%22M%200%200%20L%20-5%205%20Z%22%20dur%3D%220.25s%22%20begin%3D%22BottomAnim.end%22%20id%3D%22BottomLeftAnim%22%20%2F%3E%20%3CanimateMotion%20xlink%3Ahref%3D%22%23TopLeft%22%20path%3D%22M%200%200%20L%20-5%20-5%20Z%22%20dur%3D%220.25s%22%20begin%3D%22BottomLeftAnim.end%22%20id%3D%22TopLeftAnim%22%20%2F%3E%3C%2Fsvg%3E');
 }