8345337: JFR: jfr view should display all direct subfields for an event type

Backport-of: 672c413c61d9b155020a0fd4bd1c2bc0661a60fb

Author: Satyen Subramaniam

src/jdk.jfr/share/classes/jdk/jfr/internal/query/FieldBuilder.java

@@ -340,9 +340,10 @@ record WildcardElement(String name, String label, ValueDescriptor field) {
                 var subFields = we.field().getFields().reversed();
                 if (!subFields.isEmpty() && !KNOWN_TYPES.contains(we.field().getTypeName())) {
                     for (ValueDescriptor subField : subFields) {
-                        String n = we.name + "." + subField.getName();
-                        String l = we.label + " : " + makeLabel(subField, false);
-                        if (stack.size() < 2) { // Limit depth to 2
+                        // Limit depth to 2
+                        if (!we.name.contains(".")) {
+                            String n = we.name + "." + subField.getName();
+                            String l = we.label + " : " + makeLabel(subField, false);
                             stack.push(new WildcardElement(n, l, subField));
                         }
                     }