Bug 210124 [Markers] MarkersView not listening to the build jobs
The markers view needs to listen to the build jobs to show italics when running
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/CachedMarkerBuilder.java
/**
	 * Return whether or not the receiver is building.
	 * 
	 * @return boolean
	 */
	boolean isBuilding() {
		return building;
	}
	/**
	 * Schedule an update of the markers with a delay.
	 * 
	 */
	void scheduleMarkerUpdate() {
		cancelJobs();
		currentMap = null;
		progressService.schedule(markerProcessJob, SHORT_DELAY);
	}
	/**
	 * Set the category group.
	 * 
	 * @param group
	 *            {@link MarkerGroup} or <code>null</code>.
	 */
	void setCategoryGroup(MarkerGroup group) {
		generator.setCategoryGroup(group);
		scheduleMarkerUpdate();
	}
	/**
	 * Set the generator and update the contents.
	 *