Improve footer margin

Currently when an element is at the bottom of the page without additional
margin it aligns to the footer. This is never wanted, I assume.

Change-Id: Ie62c0dbeef04fa2c77119284ddcaab0f6a3ab2e7
diff --git a/dev/scss/main/main.scss b/dev/scss/main/main.scss
index 85182dc..c3478dc 100644
--- a/dev/scss/main/main.scss
+++ b/dev/scss/main/main.scss
@@ -22,7 +22,7 @@
 
 
 main {
-  padding-bottom: $footer-height;
+  padding-bottom: $footer-height + ($standard-margin / 2);
 
   margin: {
     left:  $standard-margin;