Bootprint offcanvas style fix.

themes/bootprint3/less/bootprint.less

@@ -22,6 +22,11 @@ body {
 
 /* --- Layout --- */
 .main .container { padding-top: 1rem; }
+.main .sidebar { background-color: #fff; }
+body.offcanvas .sidebar {
+  padding-left: 1rem;
+  padding-right: 1rem;
+}
 @media (min-width: 768px) {
   .main .sidebar { padding: 0; }
 }