Bug 65187 [Themes] Cascading*Registry leakage from Colors and Fonts pref page
Small leak on I20040529 For each ColorsAndFontsPreferencePage this is created, the cascading font and color registries are leaked. This is because the superclasses register a runnable with Display#disposeExec
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/FontRegistry.java
String OSLocation = location;
        String WSLocation = location;
        ResourceBundle bundle = null;
        if (osname != null) {
            OSLocation = location + "_" + osname; 
            if (wsname != null)
                WSLocation = OSLocation + "_" + wsname; 
        }
        try {
            bundle = ResourceBundle.getBundle(WSLocation);
            readResourceBundle(bundle, WSLocation);
        } catch (MissingResourceException wsException) {
            try {
                bundle = ResourceBundle.getBundle(OSLocation);
                readResourceBundle(bundle, WSLocation);
            } catch (MissingResourceException osException) {
                if (location != OSLocation) {
                    bundle = ResourceBundle.getBundle(location);
                    readResourceBundle(bundle, WSLocation);
                } else
                    throw osException;
            }
        }
    }
    /**
     * Creates an empty font registry.
     *
     * @param display the Display
     */
    public FontRegistry(Display display) {