Change Signature: Support conversion between extension and non-extension functions

idea/testData/refactoring/changeSignature/ChangeReceiverForMemberAfter.kt

@@ -0,0 +1,19 @@
+class A(val k: Int) {
+    fun String.foo(x: X, k: Int): Boolean {
+        return x.k + length() - k + this@A.k/2 > 0
+    }
+
+    fun test() {
+        "1".foo(X(0), 2)
+    }
+}
+
+class X(val k: Int)
+
+fun <T, R> with(receiver: T, f: T.() -> R): R = receiver.f()
+
+fun test() {
+    with(A(3)) {
+        "1".foo(X(0), 2)
+    }
+}