Evaluate expression: allow to call invisible members

#KT-4935 Fixed

idea/testData/checker/codeFragments/privateMember.kt

@@ -0,0 +1,12 @@
+fun foo() {
+    <caret>val a = 1
+}
+
+class MyClass {
+    private fun privateFun() = 1
+    private val privateVal = 1
+
+    private class PrivateClass {
+        val a = 1
+    }
+}