Bug 114615 [Markers] No feedback for 'Completed' tasks
There's not longer any 'check box' indicator on the Tasks View so clients can't determine whether a task has been completed or not... This is a regression...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/TableView.java
* 
	 * @return IAction
	 */
	IAction getPreferencesAction() {
		return preferencesAction;
	}
	/**
	 * Set the preferences action.
	 * 
	 * @param preferencesAction
	 */
	void setPreferencesAction(ViewPreferencesAction preferencesAction) {
		this.preferencesAction = preferencesAction;
	}
	/**
	 * Get the content provider
	 * @return MarkerTreeContentProvider
	 */
	MarkerTreeContentProvider getContentProvider() {
		return contentProvider;
	}
	/**
	 * Return the input to the viewer.
	 * @return Object
	 */
	public Object getViewerInput() {
		return getViewer().getInput();
	}
}