Bug 71287 Reuse editor preference has no effect in tree mode
options -> Reuse editors to show matches in workbench -> search - has no effect
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/JavaSearchResultPage.java
public int compare(Viewer viewer, Object e1, Object e2) {
	        String name1= fLabelProvider.getText(e1);
	        String name2= fLabelProvider.getText(e2);
	        if (name1 == null)
	            name1 = "";
	        if (name2 == null)
	            name2 = "";
	        return getCollator().compare(name1, name2);
	    }
	    
		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.ViewerSorter#getCollator()
		 */
		public final Collator getCollator() {
			if (collator == null) {
				collator= Collator.getInstance();
			}
			return collator;
		}
	}
		
	private static final int DEFAULT_ELEMENT_LIMIT = 1000;
	private static final String FALSE = "FALSE"; 
	private static final String TRUE = "TRUE"; 
	private static final String KEY_GROUPING= "org.eclipse.jdt.search.resultpage.grouping"; 
	private static final String KEY_SORTING= "org.eclipse.jdt.search.resultpage.sorting"; 
	private static final String KEY_FILTERS= "org.eclipse.jdt.search.resultpage.filters"; 
	private static final String KEY_LIMIT_ENABLED= "org.eclipse.jdt.search.resultpage.limit_enabled"; 
	private static final String KEY_LIMIT= "org.eclipse.jdt.search.resultpage.limit";