Bug 139986 [CommonNavigator] Convert catch(Error/Throwable) to SafeRunner
In several places the CN framework uses catch(Error/Throwable) to ensure that code does not bring the framework down. Change these to use SafeRunner.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/actions/CommonActionProviderDescriptor.java
/**
		 * The singleton instance.
		 */
		public static final CommonActionProviderDescriptorCompator INSTANCE = new CommonActionProviderDescriptorCompator();