A new version of System was added to project The Inbox:
http://source.squeak.org/inbox/System-hjh.969.mcz

==================== Summary ====================

Name: System-hjh.969
Author: hjh
Time: 14 October 2017, 11:14:48.026934 pm
UUID: d5fb0777-04f0-48f5-b86f-c985ff265bc1
Ancestors: System-dtl.968

Preferences implicitSelfInTiles

taken from Squeak6.0a Etoys image of Tim Felgentreff.

=============== Diff against System-dtl.968 ===============

Item was added:
+ ----- Method: Preferences class>>implicitSelfInTiles (in category 'standard queries') -----
+ implicitSelfInTiles
+         ^ self
+                 valueOfFlag: #implicitSelfInTiles
+                 ifAbsent: [false]!