remove bad transition from additional icons.

css/app.css

@@ -1004,7 +1004,7 @@ a:hover .icon.out-link   { background-position: -500px -14px;}
     padding-left: 10px;
 }
 
-/* Add placeholder only on hover for radio buttons, TODO: make this less hacky */
+/* Add placeholder only on hover for radio buttons */
 .inspector-hover .form-field.preset-radio .placeholder {
     color: #a9a9a9;
     display: block;

js/id/ui/preset.js

@@ -148,8 +148,6 @@ iD.ui.preset = function(context) {
         $buttons.on('click', show);
 
         $buttons.exit()
-            .transition()
-            .style('opacity', 0)
             .remove();
 
         function show(field) {