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
.spacing(POPUP_HORIZONTALSPACING, POPUP_VERTICALSPACING);
	/**
	 * Border thickness in pixels.
	 */
	private static final int BORDER_THICKNESS = 1;
	/**
	 * The dialog's toolbar for the move and resize capabilities.
	 */
	private ToolBar toolBar = null;
	/**
	 * The dialog's menu manager.
	 */
	private MenuManager menuManager = null;
	/**
	 * The control representing the main dialog area.
	 */
	private Control dialogArea;
	/**
	 * Labels that contain title and info text. Cached so they can be updated
	 * dynamically if possible.
	 */
	private Label titleLabel, infoLabel;
	/**
	 * Separator controls. Cached so they can be excluded from color changes.
	 */
	private Control titleSeparator, infoSeparator;
	/**
	 * Font to be used for the info area text. Computed based on the dialog's
	 * font.
	 */