NestedFolderPicker: separate toggle to force enable picker without nestedFolders (#80461)

* separate nestedFolderPickerOverride toggle to force enable it without nestedFolders

* let's call it newFolderPicker

* update unit tests and keyboard handling

* reduce spacing when no folder open chevron

---------

Co-authored-by: Josh Hunt <joshhunt@users.noreply.github.com>

pkg/services/featuremgmt/registry.go

@@ -1323,5 +1323,13 @@ var (
 			AllowSelfServe: false,
 			Created:        time.Date(2024, time.January, 10, 12, 0, 0, 0, time.UTC),
 		},
+		{
+			Name:         "newFolderPicker",
+			Description:  "Enables the nested folder picker without having nested folders enabled",
+			Stage:        FeatureStageExperimental,
+			Owner:        grafanaFrontendPlatformSquad,
+			FrontendOnly: true,
+			Created:      time.Date(2024, time.January, 12, 12, 0, 0, 0, time.UTC),
+		},
 	}
 )

pkg/services/featuremgmt/toggles_gen.csv

@@ -155,3 +155,4 @@ alertingPreviewUpgrade,experimental,@grafana/alerting-squad,2024-01-03,false,fal
 enablePluginsTracingByDefault,experimental,@grafana/plugins-platform-backend,2024-01-09,false,false,true,false
 cloudRBACRoles,experimental,@grafana/identity-access-team,2024-01-10,false,false,true,false
 alertingQueryOptimization,GA,@grafana/alerting-squad,2024-01-10,false,false,false,false
+newFolderPicker,experimental,@grafana/grafana-frontend-platform,2024-01-12,false,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -630,4 +630,8 @@ const (
 	// FlagAlertingQueryOptimization
 	// Optimizes eligible queries in order to reduce load on datasources
 	FlagAlertingQueryOptimization = "alertingQueryOptimization"
+
+	// FlagNewFolderPicker
+	// Enables the nested folder picker without having nested folders enabled
+	FlagNewFolderPicker = "newFolderPicker"
 )