Added icons to improve usability

data/ccc_roc/views/index.slim

@@ -55,12 +55,15 @@ html lang="en"
             .modal-footer
               button.btn.btn-default.pull-left type="button" data-dismiss="modal"
                 | Cancel
-              button.btn.pull-left type="button" data-toggle="collapse" data-target="#checkout_collapse" aria-expanded="false" aria-controls="checkout_collapse"
-                | Show History
+              button.btn.btn-default.pull-left type="button" data-toggle="collapse" data-target="#checkout_collapse" aria-expanded="false" aria-controls="checkout_collapse"
+                span.glyphicon.glyphicon-list-alt
+                |  Show History
               button.btn type="submit" name="switch"
+                span.glyphicon.glyphicon-transfer
                 | Switch Angel
               button.btn.btn-primary type="submit" name="return"
-                | Return Radio
+                span.glyphicon.glyphicon-home
+                |  Return Radio
               .row
                 .col-xs-12#checkout_collapse.collapse
                   table#checkouts.table.table-striped.table-hover