A new version of System was added to project The Inbox:
http://source.squeak.org/inbox/System-ct.1248.mcz

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

Name: System-ct.1248
Author: ct
Time: 2 November 2021, 2:08:54.644566 pm
UUID: dd319d9f-bf79-3348-a4fa-ab08d6074eb1
Ancestors: System-eem.1244

Honor the preference #checkForUnsavedProjects when closing a project.

=============== Diff against System-eem.1244 ===============

Item was changed:
  ----- Method: Project>>okToChange (in category 'release') -----
  okToChange
  	"Answer whether the window in which the project is housed can be dismissed -- which is destructive. We never clobber a project without confirmation"
  
  	| answer |
  	(self isCurrentProject and: [self isTopProject]) ifTrue: [
  		self inform: 'You cannot close the top project.'.
  		^ false].
  	
+ 	((Preferences valueOfFlag: #checkForUnsavedProjects) = false ==>
+ 		[self confirm: ('Do you really want to delete the project\{1}\and all its content?' withCRs translated format:{self name})])
- 	(self confirm: ('Do you really want to delete the project\{1}\and all its content?' withCRs translated format:{self name}))
  		ifFalse: [^ false].
  
  	self subProjects ifNotEmpty: [:sp |
  		answer := Project uiManager
  			chooseFrom: #(
  				"1" 'Lift all sub-projects'
  				"2" 'Discard all sub-projects (NO UNDO!!)'
  				"3 or 0" 'Cancel')
  			lines: #(2)
  			title: ('The project {1}\contains {2} sub-project(s).' withCRs translated format:{self name. sp size}).
  		
  		(answer = 0 or: [answer = 3]) ifTrue: [^ false].
  		answer = 1 ifTrue: [self liftSubProjects. ^ true].
  		answer = 2 ifTrue: [^ sp allSatisfy: [:ea | 
  				[ea okToChange] valueSuppressingMessages: {'*delete the project*and all its content*'}]]].
  	
  	^ true!