Norberto is on the right track, the search bar implementation behind the scenes is a composition of other controls, so you can lookup a control inside the searchbar and modify it.
For example,
//lookup the searchbar control, TODO: use the real id of the searchbar control
UIComponent searchBar = findComponentInRoot("searchBar");
//lookup the footer inside the searchbar by it's id
UIComponent searchBarRefinePanelFooter = findComponent(searchBar, "refinePanelFooter");
//Clear the 'cssClass' of the footer panel remove the right-justification
searchBarRefinePanelFooter.getAttributes().put("styleClass", null);
#webMethods#MWS-CAF-Task-Engine#webMethods-BPMS