Create From Usage: Quick-fix for properties

idea/testData/quickfix/createFromUsage/createVariable/property/beforeThisInExtension.kt

@@ -0,0 +1,8 @@
+// "Create property 'foo' from usage" "true"
+// ERROR: Property must be initialized or be abstract
+
+class A<T>(val n: T)
+
+fun <U> A<U>.test(): A<Int> {
+    return this.<caret>foo
+}