Bug 136244 [Dialogs] PopupDialog - API - overriding default colors should be simpler
PopupDialog has protected methods that allow you to dictate which controls in the dialog should have their foreground/background color set. However, it is not simple to override the colors themselves. The method applyColors is private, and in order to use applyForegroundColor(...), etc., you must override createContents to ensure that the subclasses' colors get set after the default colors. Instead, the method applyColors should either be made protected, or it should call protected methods that specify the foreground and background color, rather than assuming it is always the system info colors.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/PopupDialog.java
*            the text to be shown when the info area is displayed.
	 * 
	 */
	protected void setInfoText(String text) {
		infoText = text;
		if (infoLabel != null) {
			infoLabel.setText(text);
		}
	}
	/**
	 * Set the text to be shown in the popup's title area. This message has no
	 * effect if there was no title label specified when the dialog was
	 * originally opened. Subclasses may override this method.
	 * 
	 * @param text
	 *            the text to be shown when the title area is displayed.
	 * 
	 */
	protected void setTitleText(String text) {
		titleText = text;
		if (titleLabel != null) {
			titleLabel.setText(text);
		}
	}
	/**
	 * Return a boolean indicating whether this dialog will persist its bounds.
	 * This value is initially set in the dialog's constructor, but can be
	 * modified if the persist bounds action is shown on the menu and the user
	 * has changed its value. Subclasses may override this method.
	 *