Bug 295981 [Forms] FormImages & FormFonts are not disposed correctly
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/internal/forms/widgets/FormFonts.java
private static FormFonts instance;
	public static FormFonts getInstance() {
		if (instance == null)
			instance = new FormFonts();
		return instance;
	}
	
	private LocalResourceManager resources;
	private HashMap descriptors;
	
	private FormFonts() {
	}
	
	private class BoldFontDescriptor extends FontDescriptor {