Date picker in pm_filter doesn't use start of week setting.

In the template pm_filter the date picker doesn't use the user setting regarding start of the week:

vBulletin.register_control("vB_DatePicker", "startdate_year", "startdate_", "1");
vBulletin.register_control("vB_DatePicker", "enddate_year", "enddate_", "1");

Is this behaviour wanted or could there be a problem with:

vBulletin.register_control("vB_DatePicker", "startdate_year", "startdate_", bbuserinfo[startofweek]);
vBulletin.register_control("vB_DatePicker", "enddate_year", "enddate_", bbuserinfo[startofweek]);