Bug 213504 [Markers] Problems View no longer supports dragging into the Editor Area
I20071218-0800. You used to be able to drag an error into the Editor Area in order to open the associated file. I commonly use the DnD gesture to open a 'problem' but it appears that this isn't working in the new version...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
* Return whether or not generator is the selected one.
	 * 
	 * @param generator
	 * @return boolean
	 */
	boolean isShowing(MarkerContentGenerator generator) {
		return this.builder.getGenerator().equals(generator);
	}
	/**
	 * Log that a generator id is invalid.
	 * 
	 * @param id
	 */
	void logInvalidGenerator(String id) {
		StatusManager.getManager().handle(
				new Status(IStatus.WARNING, IDEWorkbenchPlugin.IDE_WORKBENCH,
						NLS.bind("Invalid markerContentGenerator {0} ", 
								id)));
	}
	/**
	 * Open the filters dialog for the receiver.
	 */
	void openFiltersDialog() {
		FiltersConfigurationDialog dialog = new FiltersConfigurationDialog(
				new SameShellProvider(getSite().getWorkbenchWindow().getShell()),
				builder);
		if (dialog.open() == Window.OK) {
			builder.updateFrom(dialog);
		}
	}