Thiddlywiki allows to turn off the timestamp for $action-setfield
See https://tiddlywiki.com/#ActionSetFieldWidget
$timestamp
| Specifies whether the timestamp(s) of the target tiddler will be updated (modified and modifier, plus created and creator for newly created tiddlers). Can be “yes” (the default) or “no”
But how can I turn off timestamp for SelectWidget for example
<$select field="readstatus" default="unread" >
<option value="unread">unread</option>
<option value="partial">partial</option>
<option value="read">read</option>
<option value="reread">reread</option>
</$select>