Bug 202316 [Forms] Add gradient sharing support for FormHeading
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/internal/forms/widgets/FormHeading.java
this.backgroundImage = image;
		if (image != null)
			setBackground(null);
		if (isBackgroundImageTiled()) {
			setBackgroundImage(image);
		} else
			updateGradientImage();
	}
	public Image getHeadingBackgroundImage() {
		return backgroundImage;
	}
	public void setBackgroundImageTiled(boolean tiled) {
		if (tiled)
			flags |= BACKGROUND_IMAGE_TILED;
		else
			flags &= ~BACKGROUND_IMAGE_TILED;
		setHeadingBackgroundImage(this.backgroundImage);
	}
	public boolean isBackgroundImageTiled() {
		return (flags & BACKGROUND_IMAGE_TILED) != 0;
	}
	public void setBackgroundImage(Image image) {
		super.setBackgroundImage(image);
		if (image != null) {
			internalSetBackground(null);
		}
	}
	/**
	 * Returns the tool bar manager that is used to manage tool items in the
	 * form's title area.