[264471] Changes to validator's filter settings don't get persisted
diff --git a/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/ValidatorMutable.java b/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/ValidatorMutable.java
index 324628f..d18b0c5 100644
--- a/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/ValidatorMutable.java
+++ b/plugins/org.eclipse.wst.validation/vf2/org/eclipse/wst/validation/internal/ValidatorMutable.java
@@ -165,7 +165,10 @@
 	public void replaceFilterGroup(FilterGroup existing, FilterGroup merged) {
 		int i = find(existing);
 		if (i == -1)add(merged);  // this should never happen
-		else _groups[i] = merged;
+		else {
+			_groups[i] = merged;
+			bumpChangeCountGroups();
+		}
 	}
 	
 	public void remove(FilterGroup group) {