Bug 97810 [preferences] Code template preference page buttons are not grayed out if invoked as project specific property page
3.1 RC1 Steps to reproduce: - Invoke Override Method on a project with no project-specific settings - Follow link to code template preference page -> Edit, Import, ... buttons are disabled, but not grayed out -> Toggling 'Enable project specific settings twice correctly grays out the buttons
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/dialogfields/TreeListDialogField.java
fTree.refresh();
		}
	}
	
	/**
	* Refreshes the tree.
	*/
	public void refresh(Object element) {
		if (isOkToUse(fTreeControl)) {
			fTree.refresh(element);
		}
	}
	
	/**
	* Updates the element.
	*/
	public void update(Object element) {
		if (isOkToUse(fTreeControl)) {
			fTree.update(element, null);
		}
	}	
	
	private List moveUp(List elements, List move) {
		int nElements= elements.size();
		List res= new ArrayList(nElements);
		Object floating= null;
		for (int i= 0; i < nElements; i++) {
			Object curr= elements.get(i);
			if (move.contains(curr)) {
				res.add(curr);