Tweak the sidenav CSS by removing the hardcoded height and adding a small padding to the bottom.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=305302509

Author: Chang-Eric

_sass/components/_sidenav.scss

@@ -22,8 +22,7 @@
   position: relative;
   float:left;
   left: 0;
-  height: 1000px;
-  padding: 0 2.5rem;
+  padding: 0 2.5rem 2.5rem;
   background: $t-theme;
   z-index: 10;
   list-style-type: none;