添加Metronic（作为LFS）

frontend/static/assets/global/plugins/iCheck/skins/polaris/polaris.css

@@ -0,0 +1,59 @@
+/* iCheck plugin Polaris skin
+----------------------------------- */
+.icheckbox_polaris,
+.iradio_polaris {
+    display: inline-block;
+    *display: inline;
+    vertical-align: middle;
+    margin: 0;
+    padding: 0;
+    width: 29px;
+    height: 29px;
+    background: url(polaris.png) no-repeat;
+    border: none;
+    cursor: pointer;
+}
+
+.icheckbox_polaris {
+    background-position: 0 0;
+}
+    .icheckbox_polaris.hover {
+        background-position: -31px 0;
+    }
+    .icheckbox_polaris.checked {
+        background-position: -62px 0;
+    }
+    .icheckbox_polaris.disabled {
+        background-position: -93px 0;
+        cursor: default;
+    }
+    .icheckbox_polaris.checked.disabled {
+        background-position: -124px 0;
+    }
+
+.iradio_polaris {
+    background-position: -155px 0;
+}
+    .iradio_polaris.hover {
+        background-position: -186px 0;
+    }
+    .iradio_polaris.checked {
+        background-position: -217px 0;
+    }
+    .iradio_polaris.disabled {
+        background-position: -248px 0;
+        cursor: default;
+    }
+    .iradio_polaris.checked.disabled {
+        background-position: -279px 0;
+    }
+
+/* HiDPI support */
+@media (-o-min-device-pixel-ratio: 5/4), (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 120dpi) {
+    .icheckbox_polaris,
+    .iradio_polaris {
+        background-image: url(polaris@2x.png);
+        -webkit-background-size: 310px 31px;
+        background-size: 310px 31px;
+    }
+}