Fix variable filter name edit in design tool

fixes #237

gui/index.html

@@ -2941,7 +2941,7 @@ double s_freq = .0625;</p>
 		object uses approximately 4% of the CPU time on Teensy 3.1.
 	</p>
 </script>
-<script type="text/x-red" data-template-name="AudioFilterFIR">
+<script type="text/x-red" data-template-name="AudioFilterStateVariable">
 	<div class="form-row">
 		<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
 		<input type="text" id="node-input-name" placeholder="Name">