Bugfix: loading same file twice

generator/generate.html

         <div class="row">
             <div class="col-md-12 col-lg-3">
                 <!--<h3>Menu</h3>-->
-                <form role="form" class="form-horizontal">
+                <form style="display:none" id="file-load-form">
                     <input type="file" id="file-load" name="files[]" multiple class="form-control" style="display:none" />
+                </form>
+                <form role="form" class="form-horizontal">
                     <div class="form-group">
                         <div class="col-sm-6">
                             <button type="button" class="btn btn-info btn-block" id="button-help">Open Help</button>

generator/js/ui.js

 
         reader.readAsText(f);
     }
+
+    // Reset file input
+    $("#file-load-form")[0].reset();
 }
 
 function ui_add_cards(data) {