Extend sidebar blur to body

Change-Id: Ieac3f58722a03b1c440fd6863747badcc78d4a02
diff --git a/dev/scss/sidebar/sidebar.scss b/dev/scss/sidebar/sidebar.scss
index 384f598..eb9f4c7 100644
--- a/dev/scss/sidebar/sidebar.scss
+++ b/dev/scss/sidebar/sidebar.scss
@@ -26,10 +26,10 @@
     opacity: 1;
   }
   &::after {
+    position: absolute;
     display: block;
     opacity: 0;
     cursor: pointer;
-    position: absolute;
     right: 0;
     bottom: 0;
     margin-right: -1 * ($standard-margin / 2);