standard/controlfooter.jsp always closes the row with the </tr> tag, however standard/controlfooter.jsp does not open the row (<tr>) if the nolabel param is set, as a result causes a malformed HTML.

This is reproduceable on the Bulk Edit User Members page as it has:

<ui:component name="'usersToAssignStr'" value="usersToAssignStr" template="multiuserpicker.jsp">
    <ui:param name="'nolabel'" value="'true'"/>
    <ui:param name="'style'" value="''"/>
</ui:component>

This can be fixed by adding a check to the controlfooter.jsp as it is done in controlheader.jsp.
But the proper fix would involve moving the multiuserpicker.jsp to the single theme instead of the standard theme