Added logic to prevent DataComponentComposite from refreshing its

widgets if it's already disposed. *Why* widgets on a disposed composite
are being refreshed... I cannot figure out, but at least there isn't a
wall of disposed exceptions now when you launch a job.

Signed-off-by: Anna Wojtowicz <wojtowicza@ornl.gov>

src/org.eclipse.ice.client.widgets/src/org/eclipse/ice/client/widgets/DataComponentComposite.java

@@ -154,6 +154,11 @@ public void handleEvent(Event e) {
 	public void refresh() {
 		// begin-user-code
 
+		// Don't try to refresh anything if this composite is already disposed
+		if (isDisposed()) {
+			return;
+		}
+
 		// Local Declarations
 		boolean rewrite = false;
 		List<Entry> entries = dataComp.retrieveAllEntries();