Marcel Taeumel uploaded a new version of Tools to project The Trunk:
http://source.squeak.org/trunk/Tools-mt.855.mcz

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

Name: Tools-mt.855
Author: mt
Time: 22 July 2019, 11:50:35.866271 am
UUID: cf7f6661-b022-4863-9fdb-5225000135af
Ancestors: Tools-mt.854

Complements System-mt.1073.

Not that this only works if SystemNavigation always uses its environment and not the incoming class' environment. See:

Behavior >> #allCallsOn:
Object >> #systemNavigation

=============== Diff against Tools-mt.854 ===============

Item was changed:
  ----- Method: ObjectExplorer>>browseClassRefs (in category 'menus - actions') -----
  browseClassRefs
  
  	self selectedClass ifNotNil: [:cls |
+ 		cls isTrait ifFalse: [self systemNavigation browseAllCallsOnClass: cls]]!
- 		cls isTrait ifFalse: [
- 			self systemNavigation browseAllCallsOn: (self environment bindingOf: cls theNonMetaClass name)]]!

Item was changed:
  ----- Method: StringHolder>>browseClassRefs (in category '*Tools-traits') -----
  browseClassRefs
  
  	self selectedClass ifNotNil: [:cls |
+ 		cls isTrait ifFalse: [self systemNavigation browseAllCallsOnClass: cls]]
- 		cls isTrait ifFalse: [
- 			self systemNavigation browseAllCallsOn: (self environment bindingOf: cls theNonMetaClass name)]]
  !