Bug 12775 [Dialogs] double click behaviour in move dialog (package view)
I double-clicked on a project, but instead of expanding the project and showing the children (source folders), it accepted the project as the target and commited OK. I think it's more natural that double clicking on projects, packages, etc. would expand/unexpand the node.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/reorg/JdtMoveAction.java
private Button fPreview;
		
		MoveDestinationDialog(Shell parent, ILabelProvider labelProvider, 	ITreeContentProvider contentProvider, MoveRefactoring refactoring){
			super(parent, labelProvider, contentProvider);
			fRefactoring= refactoring;
			fShowPreview= false;
		}
		
		protected Control createDialogArea(Composite parent) {
			Composite result= (Composite)super.createDialogArea(parent);
			fCheckbox= new Button(result, SWT.CHECK);
			fCheckbox.setText(ReorgMessages.getString("JdtMoveAction.update_references")); 
			fCheckbox.setEnabled(canUpdateReferences());
			fCheckbox.addSelectionListener(new SelectionAdapter() {
				public void widgetSelected(SelectionEvent e) {
					updatePreviewButton();
					fRefactoring.setUpdateReferences(fCheckbox.getEnabled() && fCheckbox.getSelection());
				}
			});
			fCheckbox.setSelection(canUpdateReferences());
			return result;
		}
		
		protected void createButtonsForButtonBar(Composite parent) {
			super.createButtonsForButtonBar(parent);
			fPreview= createButton(parent, PREVIEW_ID, ReorgMessages.getString("JdtMoveAction.preview"), false); 
		}
		
		protected void updateOKStatus() {
			super.updateOKStatus();