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
return new Object[0];
				Object[] filtered= super.getFilteredChildren(parentElement);
				int elementLimit = getElementLimit();
				if (limitElements() && parentElement.equals(getInput()) &&  filtered.length > elementLimit) {
					Object[] limited= new Object[elementLimit];
					System.arraycopy(filtered, 0, limited, 0, limited.length);
					return limited;
				} else 
					return filtered;
			}
		};
	}
	
	void setSortOrder(int order) {
		fCurrentSortOrder= order;
		StructuredViewer viewer= getViewer();
		viewer.getControl().setRedraw(false);
		DecoratingLabelProvider dlp= (DecoratingLabelProvider) viewer.getLabelProvider();
		((SortingLabelProvider)dlp.getLabelProvider()).setOrder(order);
		viewer.getControl().setRedraw(true);
		viewer.refresh();
		getSettings().put(KEY_SORTING, fCurrentSortOrder);
	}
	public void init(IPageSite site) {
		super.init(site);
		IMenuManager menuManager = site.getActionBars().getMenuManager();
		menuManager.insertBefore(IContextMenuConstants.GROUP_PROPERTIES, new Separator(GROUP_FILTERING));
		fActionGroup.fillActionBars(site.getActionBars());
		menuManager.appendToGroup(GROUP_FILTERING, fFilterDialogAction);
	}