Fixed availability of "Make abstract" and "Implement members" quickfixes

idea/testData/quickfix/override/implementMemberFromAbstractClass.kt.after

@@ -0,0 +1,10 @@
+// "Implement members" "true"
+abstract class A {
+    abstract fun foo()
+}
+
+class B : A() {
+    override fun foo() {
+        throw UnsupportedOperationException()
+    }
+}