index3.html: re-enabled TF

src/multicam/index3.html

@@ -57,7 +57,7 @@
                <tr><td><label for="scnr">SCNR</label></td><td><input type="checkbox" id="scnr" name="scnr" checked="checked"></td></tr>
                <tr><td><label for="srnr">SRNR</label></td><td><input type="checkbox" id="srnr" name="srnr" checked="checked"></td></tr>
                <tr><td><label for="spnr">SPNR</label></td><td><input type="checkbox" id="spnr" name="spnr" checked="checked"></td></tr>
-               <tr><td><label for="tf">TF</label></td><td><input type="checkbox" id="tf" name="tf" checked="checked" disabled="disabled"></td></tr>
+               <tr><td><label for="tf">TF</label></td><td><input type="checkbox" id="tf" name="tf" checked="checked"></td></tr>
                <tr><td><label for="tf_delta_nf">TF DELTA NF</label></td><td><input type="text" id="tf_delta_nf" name="tf_delta_nf"size="5" value="?">s</td></tr>
            </table>
            </td></tr></table>