Refactoring: make "if-then to safe access" an inspection

idea/testData/inspectionsLocal/branched/ifThenToSafeAccess/willNotInlineClassProperty.kt.after

@@ -0,0 +1,8 @@
+class F(a: Int?) {
+    val b = a
+    val c = b?.toString()
+}
+
+fun main(args: Array<String>) {
+    F(1).c
+}