A new version of Tools was added to project The Inbox:
http://source.squeak.org/inbox/Tools-ct.858.mcz

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

Name: Tools-ct.858
Author: ct
Time: 2 August 2019, 7:23:35.594625 pm
UUID: 3ece1c71-070b-0e48-a0aa-1e259555dbee
Ancestors: Tools-ct.857

Inspector: Try to keep field selection when changing object

Instead of unselecting the field viewed latest when another object is assigned, keep the selection unless it is no more valid (got a phantom)

Example where this is useful: debug World allMorphs, select owner in the receiver view and watch the selection while stepping a few times into #allMorphsDo:.

=============== Diff against Tools-ct.857 ===============

Item was changed:
  ----- Method: Inspector>>object: (in category 'accessing') -----
  object: anObject 
  	"Set anObject to be the object being inspected by the receiver."
  
+ 	| oldSelection oldFields newFields commonFieldRange |
- 	| oldIndex |
  	anObject == object
  		ifTrue: [self update]
  		ifFalse:
+ 			[oldSelection := selectionIndex.
+ 			oldFields := self fieldList.
- 			[oldIndex := selectionIndex <= 2 ifTrue: [selectionIndex] ifFalse: [0].
  			self inspect: anObject.
+ 			newFields := self fieldList.
+ 			commonFieldRange := ((1 to: (oldFields size min: newFields size))
+ 				select: [:i | (oldFields at: i) = (newFields at: i)])
+ 					ifNotEmpty: #last
+ 					ifEmpty: [0].
- 			oldIndex := oldIndex min: self fieldList size.
  			self changed: #inspectObject.
+ 			self toggleIndex: (oldSelection <= commonFieldRange
+ 				ifTrue: [oldSelection]
+ 				ifFalse: [0]).
- 			oldIndex > 0
- 				ifTrue: [self toggleIndex: oldIndex].
  			self changed: #fieldList.
  			self changed: #contents.
  			self changed: #helpText]!