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
* may optionally override the creation of the title area and info area in order
 * to add content. In general, however, the creation of stylistic features, such
 * as the dialog menu, separator styles, and fonts, is kept private so that all
 * popup dialogs will have a similar appearance.
 * 
 * @since 3.2
 */
public class PopupDialog extends Window {
	/**
	 * 
	 */
	private static final GridDataFactory LAYOUTDATA_GRAB_BOTH = GridDataFactory
			.fillDefaults().grab(true, true);
	/**
	 * The dialog settings key name for stored dialog x location.
	 */
	private static final String DIALOG_ORIGIN_X = "DIALOG_X_ORIGIN"; 
	/**
	 * The dialog settings key name for stored dialog y location.
	 */
	private static final String DIALOG_ORIGIN_Y = "DIALOG_Y_ORIGIN"; 
	/**
	 * The dialog settings key name for stored dialog width.
	 */
	private static final String DIALOG_WIDTH = "DIALOG_WIDTH"; 
	/**
	 * The dialog settings key name for stored dialog height.
	 */
	private static final String DIALOG_HEIGHT = "DIALOG_HEIGHT"; 
	/**