Bug 51991 [Progress] Half-busy cursor API on site progress service
Currently the Team components set the half-busy cursor in views that are running a job via the IWorkbenchSiteProgressService mechanism. But we can't show this cursor on the toolbar or view title pane. It would be better if the site progress service had API for setting the cursor on the partpane. This would allow showing the half-busy cursor for the entire part.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/TableContentProvider.java
* Performs a single update to the viewer. Based on the contents of the pending* queues,
	 * items will either be removed, added, or refreshed in the viewer (in that order). This
	 * should only be called within a synchronized block, since the various queues shouldn't
	 * be modified during an update. This method is invoked repeatedly by jobs to gradually
	 * apply the pending changes.
	 */
	private int updateViewer() {
		
		int result;
		
		
		
		
		lock.acquire();
		try {
			if (getViewer().getSorter() != null) {
				getViewer().setSorter(null);
			}
			
			resync();
			
			result = queues.nextUpdate();
		} finally {
			lock.release();
		}
		
		return result;
	}	
}