fixed options list in input

Author: olton

examples/input.html

@@ -31,6 +31,10 @@
         <input type="text" data-role="input" data-prepend-options="http://,https://">
         <input type="text" data-role="input" data-append-options="http://,https://">
     </div>
+
+    <div class="example mt-4">
+        <input type="text" data-role="input" data-custom-buttons='[{"text": "✓", "cls": "success", "onclick": "alert(\"Confirmed\")"}]'>
+    </div>
 </div>
 
 <script src="../lib/metro.js"></script>