Adjust the spacing between search bar and top navigation to improve usability (fixes #251)

Change-Id: I367f2252ee41f0b15eb6d4258b5d88ecbc6515e6
diff --git a/dev/scss/header/searchbar.scss b/dev/scss/header/searchbar.scss
index 4ce0b12..dbb8d6c 100644
--- a/dev/scss/header/searchbar.scss
+++ b/dev/scss/header/searchbar.scss
@@ -12,7 +12,7 @@
   display:       block;
   margin-bottom: 3px;
   width:         100%;
-  margin:        0;
+  margin:        1.5rem 0 0 0;
   border-radius: 6px;
 
   &::-webkit-search-cancel-button {