support the quicksubscribe plugin

css/plugins/quicksubscribe.less

@@ -0,0 +1,24 @@
+/**
+ * This file provides styles for the quicksubscribe plugin
+ */
+
+.page-attributes {
+    li.plugin_quicksubscribe {
+        a.plugin_qsub_subscribe {
+            svg {
+                width: 1.6em;
+                height: 1.6em;
+                font-size: 0.82rem;
+                fill: @ini_nav_menu_hover_color;
+            }
+        }
+
+        a:hover,
+        a:focus,
+        a:active {
+            svg {
+                fill: @ini_nav_menu_hover_bg;
+            }
+        }
+    }
+}