Fixed z-index definitions to avoid hiding of tree menus

Change-Id: I71044f36ac9c195341dd38735cd8a4c45ee09a36
diff --git a/dev/scss/main/pagination.scss b/dev/scss/main/pagination.scss
index bc7e54e..9704638 100644
--- a/dev/scss/main/pagination.scss
+++ b/dev/scss/main/pagination.scss
@@ -27,7 +27,7 @@
   position: fixed;
   right: ($standard-margin / 4);
   bottom: ($standard-margin / 2);
-  z-index: 400;
+  z-index: 35;
   padding: 0;
   height: auto;
   line-height: 0;