Don't reload tags if tag section wasn't created.

Author: johnsteele

plugins/org.jboss.tools.windup.ui/src/org/jboss/tools/windup/ui/internal/rules/delegate/ClassificationDelegate.java

@@ -361,7 +361,9 @@ private CMElementDeclaration getTagCmNode() {
 		@Override
 		protected void bind() {
 			super.bind();
-			loadTags();
+			if (this.tagsTreeViewer != null) {
+				loadTags();
+			}
 		}
 
 		@SuppressWarnings("deprecation")