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
fCurrentGrouping= getSettings().getInt(KEY_GROUPING);
		} catch (NumberFormatException e) {
			fCurrentGrouping= LevelTreeContentProvider.LEVEL_PACKAGE;
		}
		String encodedFilters= getSettings().get(KEY_FILTERS);
		restoreFilters(encodedFilters);
		fLimitElements= !FALSE.equals(getSettings().get(KEY_LIMIT_ENABLED));
		try {
			fElementLimit= getSettings().getInt(KEY_LIMIT);
		} catch (NumberFormatException e) {
			fElementLimit= DEFAULT_ELEMENT_LIMIT;
		}
		if (memento != null) {
			Integer value= memento.getInteger(KEY_GROUPING);
			if (value != null)
				fCurrentGrouping= value.intValue();
			value= memento.getInteger(KEY_SORTING);
			if (value != null)
				fCurrentSortOrder= value.intValue();
			encodedFilters= memento.getString(KEY_FILTERS);
			restoreFilters(encodedFilters);
			fLimitElements= !FALSE.equals(memento.getString(KEY_LIMIT_ENABLED));
			value= memento.getInteger(KEY_LIMIT);
			if (value != null)
				fElementLimit= value.intValue();
		}
	}
	
	private void restoreFilters(String encodedFilters) {
		if (encodedFilters != null) {