Offer simplified version to create LocalResourceManager

Frequently LocalResourceManager(JFaceResources.getResources(), parent)
is used in client code. This add a helper method on JFaceResource to
simplify such call.

Fixed eclipse-platform#1208

bundles/org.eclipse.jface/src/org/eclipse/jface/resource/JFaceResources.java

@@ -32,6 +32,7 @@
 import org.eclipse.jface.wizard.Wizard;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.FrameworkUtil;
@@ -583,6 +584,23 @@ public static void setFontRegistry(FontRegistry registry) {
 		fontRegistry = registry;
 	}
 
+
+	/**
+	 * Creates a local registry that wraps the ResourceManager for the current
+	 * display. Anything allocated by this registry will be automatically cleaned up
+	 * with the given control is disposed. Note that registries created in this way
+	 * should not be used to allocate any resource that must outlive the given
+	 * control.
+	 *
+	 * shortcut for
+	 * <code>LocalResourceManager(JFaceResources.getResources(), owner)</code>
+	 *
+	 * @param owner control whose disposal will trigger cleanup of everything in the
+	 *              registry.
+	 */
+	static LocalResourceManager managerFor(Control owner) {
+		return new LocalResourceManager(getResources(), owner);
+	}
 	/**
 	 * Declare a private constructor to block instantiation.
 	 */