web/vtctld: Fix sidenav button width.

web/vtctld/app.css

@@ -24,7 +24,7 @@ md-sidenav md-list .md-button {
   color: inherit;
   font-weight: 500;
   text-align: left;
-  width: 100%;
+  width: 95%;
 }
 
 md-sidenav md-list .md-button.selected {