refactor: extract updateProjectSelection from projectIndex:

Resolves #392 (comment)

src/Squit.package/SquitBrowser.class/instance/actionProjectChangeDirectory.st

@@ -8,4 +8,4 @@ actionProjectChangeDirectory
 		from: (FileDirectory on: gitRepository workingDir pathName).
 	directory ifNil: [^ self].
 	gitRepository workingDir: (FileSystem disk root resolve: directory pathName).
-	self projectSelection: self projectSelection. "updates repositoryExists, selectedHistorian, et al."
+	self updateProjectSelection.

src/Squit.package/SquitBrowser.class/instance/projectIndex..st

@@ -2,11 +2,4 @@ ui
 projectIndex: anIndex
 	anIndex > 1 ifFalse: [^ self].
 	projectIndex := anIndex.
-	repositoryExists := self projectSelection repository exists.
-	selectedHistorian := self projectSelection loadedHistorian.
-	self changed: #branchSelection.
-	commitSelection := nil.
-	commitToDiffAgainst := nil.
-	cachedCommitList := #().
-	repositoryExists ifFalse: [self informThatProjectDoesNotExist].
-	self refresh.
+	self updateProjectSelection.

src/Squit.package/SquitBrowser.class/instance/updateProjectSelection.st

@@ -0,0 +1,10 @@
+ui
+updateProjectSelection
+	repositoryExists := self projectSelection repository exists.
+	selectedHistorian := self projectSelection loadedHistorian.
+	self changed: #branchSelection.
+	commitSelection := nil.
+	commitToDiffAgainst := nil.
+	cachedCommitList := #().
+	repositoryExists ifFalse: [self informThatProjectDoesNotExist].
+	self refresh.

src/Squit.package/SquitBrowser.class/methodProperties.json

@@ -61,7 +61,7 @@
 		"actionPackageInfoObjectEditPreamble" : "jr 5/13/2017 21:16",
 		"actionPackageInfoObjectEditPreambleOfRemoval" : "jr 5/13/2017 21:16",
 		"actionProjectAdd" : "jr 5/11/2017 14:09",
-		"actionProjectChangeDirectory" : "ct 10/4/2022 20:16",
+		"actionProjectChangeDirectory" : "ct 5/2/2024 19:05",
 		"actionProjectClone" : "jr 8/8/2020 00:31",
 		"actionProjectRemove" : "jr 8/10/2020 00:29",
 		"actionProjectRename" : "jr 7/24/2020 11:33",
@@ -173,7 +173,7 @@
 		"offerToAddFirstProject" : "fn 4/26/2017 16:04",
 		"packageFormatMenuSpec" : "jr 8/31/2020 22:27",
 		"projectIndex" : "jr 8/10/2020 00:19",
-		"projectIndex:" : "jr 7/9/2022 09:37",
+		"projectIndex:" : "ct 5/2/2024 19:05",
 		"projectList" : "fn 4/11/2017 11:48",
 		"projectListMenu:shifted:" : "ct 10/4/2022 20:28",
 		"projectSelection" : "fn 4/11/2017 17:12",
@@ -210,6 +210,7 @@
 		"timeOfLastListUpdate" : "fn 4/11/2017 18:00",
 		"toggleMetadata" : "jr 3/17/2019 22:07",
 		"updateHistorianDecorationsMap" : "jr 7/2/2022 21:56",
+		"updateProjectSelection" : "ct 5/2/2024 19:05",
 		"wantsBranchListDrop:type:from:" : "jr 5/9/2020 14:30",
 		"wantsCommitListDrop:type:from:" : "jr 5/9/2020 14:44",
 		"wantsObjectListDrop:type:from:" : "jr 2/9/2020 00:08",