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
memento.putInteger(KEY_LIMIT, getElementLimit());
	}
	
	void addMatchFilter(MatchFilter filter) {
		fMatchFilters.add(filter);
		filtersChanged();
	}
	
	void enableLimit(boolean enable) {
		fLimitElements= enable;
		if (fLimitElements)
			getSettings().put(KEY_LIMIT_ENABLED, TRUE);
		else 
			getSettings().put(KEY_LIMIT_ENABLED, FALSE);
		limitChanged();
	}
	
	/**
	 * 
	 */
	private void limitChanged() {
		getViewer().refresh();
		getViewPart().updateLabel();
	}
	boolean limitElements() {
		return fLimitElements;
	}
	
	void removeMatchFilter(MatchFilter filter) {
		fMatchFilters.remove(filter);