Bug 220767 [Dialogs] PopupDialog's HOVER_SHELLSTYLE should use SWT.TOOL
3.3.x and 3.4 M5. The SWT.TOOL flag should be used to create hover style shells, hence the PopupDialog's HOVER_SHELLSTYLE should use SWT.TOOL.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/PopupDialog.java
* Fill the dialog's menu. Subclasses may extend or override.
	 * 
	 * @param dialogMenu
	 *            The dialog's menu.
	 */
	protected void fillDialogMenu(IMenuManager dialogMenu) {
		dialogMenu.add(new GroupMarker("SystemMenuStart")); 
		dialogMenu.add(new MoveAction());
		dialogMenu.add(new ResizeAction());
		if (showPersistActions) {
			dialogMenu.add(new PersistLocationAction());
			dialogMenu.add(new PersistSizeAction());
		}
		dialogMenu.add(new Separator("SystemMenuEnd")); 
	}
	/**
	 * Perform the requested tracker action (resize or move).
	 * 
	 * @param style
	 *            The track style (resize or move).
	 */
	private void performTrackerAction(int style) {
		Shell shell = getShell();
		if (shell == null || shell.isDisposed()) {
			return;
		}
		Tracker tracker = new Tracker(shell.getDisplay(), style);
		tracker.setStippled(true);
		Rectangle[] r = new Rectangle[] { shell.getBounds() };
		tracker.setRectangles(r);