Fix Opening treenode text color bug

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/tree/AllOpeningsNode.java

@@ -16,13 +16,21 @@ public class AllOpeningsNode extends Renderable {
 
 	@Override
 	public void refreshTextColor() {
-		for (Opening bp : openings) {
-			if (bp.containsAnyError()) {
-				setStatus(CheckStatus.ERROR);
-				return;
+		boolean wasChecked = false;
+		for (Opening op : openings) {
+			if (op.isValidated()) {
+				wasChecked = true;
+				if (op.containsAnyError()) {
+					setStatus(CheckStatus.ERROR);
+					return;
+				}
 			}
 		}
-		setStatus(CheckStatus.OK);	
+		if (wasChecked) {
+			setStatus(CheckStatus.OK);
+		} else {
+			setStatus(CheckStatus.NOT_CHECKED);
+		}
 	}
 
 	@Override