Synthetic java properties are not always bold in completion and are not sorted as extensions

idea/idea-completion/testData/basic/common/boldOrGrayed/NonPredictableSmartCast.kt

@@ -0,0 +1,15 @@
+fun String.forString(){}
+fun Any.forAny(){}
+
+fun <T> T.forT() {}
+
+fun f(pair: Pair<out Any, out Any>) {
+    if (pair.first !is String) return
+    pair.first.<caret>
+}
+
+// EXIST: { lookupString: "length", attributes: "grayed" }
+// EXIST: { lookupString: "hashCode", attributes: "bold" }
+// EXIST: { lookupString: "forString", attributes: "grayed" }
+// EXIST: { lookupString: "forAny", attributes: "bold" }
+// EXIST: { lookupString: "forT", attributes: "" }