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
protected void handleLabelProviderChanged(LabelProviderChangedEvent event) {
				getTable().setRedraw(false);
				try {
					super.handleLabelProviderChanged(event);
				} finally {
					getTable().setRedraw(true);
				}
			}
			
			public void add(Object[] elements) {
				if (limitElements()) {
					int elementLimit= getElementLimit();
					int currentCount= getTable().getItemCount();
					if (currentCount >= elementLimit)
						return;
					if (currentCount + elements.length <= elementLimit) {
						super.add(elements);
						return;
					}
					int toAdd= elementLimit-currentCount;
					Object[] limited= new Object[toAdd];
					System.arraycopy(elements, 0, limited, 0, limited.length);
					super.add(limited);
					return;
				} else {
					super.add(elements);
				}
			}
			protected Object[] getFilteredChildren(Object parentElement) {
				if (parentElement == null)