Introduce "add missing actual members" quick-fix #KT-18449 Fixed

idea/testData/multiModuleQuickFix/classFunction/header/header.kt

@@ -0,0 +1,5 @@
+// DISABLE-ERRORS
+
+expect class My {
+    fun foo(param: String): Int
+}

idea/testData/multiModuleQuickFix/classFunction/header/header.kt.after

@@ -0,0 +1,5 @@
+// DISABLE-ERRORS
+
+expect class My {
+    fun foo(param: String): Int
+}

idea/testData/multiModuleQuickFix/classFunction/jvm/My.kt

@@ -0,0 +1,4 @@
+// "Add missing actual members" "true"
+// DISABLE-ERRORS
+
+actual class <caret>My

idea/testData/multiModuleQuickFix/classFunction/jvm/My.kt.after

@@ -0,0 +1,8 @@
+// "Add missing actual members" "true"
+// DISABLE-ERRORS
+
+actual class My {
+    actual fun foo(param: String): Int {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}