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
}
	/**
	 * 
	 * @return True if this is a nested &lt;actionProvider /&gt; element.
	 */
	public boolean isNested() {
		return isNested;
	}
	/**
	 * 
	 * @return The value specified by the <i>dependsOn</i> attribute of the
	 *         &lt;actionProvider /&gt; element.
	 */
	public String getDependsOnId() {
		return dependsOnId;
	}
	/**
	 * 
	 * @return The value specified by the <i>overridesId</i> attribute of the
	 *         &lt;actionProvider /&gt; element.
	 */
	public String getOverridesId() {
		return overridesId;
	}
	
	/**
	 * 
	 * @return The value specified by the <i>appearsBefore</i> attribute of the
	 *         &lt;actionProvider /&gt; element.
	 */