Request read receipt radio button checked by default

[Protoman]

edit the pm_newpm template

find

<if condition="$show['trackpm']"><div><label for="cb_receipt"><input type="checkbox" name="receipt" value="1" id="cb_receipt" $checked[receipt] />$vbphrase[request_receipt_for_message]</label></div></if>

replace with

<if condition="$show['trackpm']"><div><label for="cb_receipt"><input type="checkbox" name="receipt" value="1" id="cb_receipt" checked />$vbphrase[request_receipt_for_message]</label></div></if>