GrafanaUI: Remove blurred background from overlay backdrops to improve performance (#103563)

* default noBackdropBlur to enabled

* move blur from hacks to theme.components, tweak backdrop colour

* remove toggle completely

* fix unused import

pkg/services/featuremgmt/registry.go

@@ -1712,15 +1712,6 @@ var (
 			HideFromDocs:      true,
 			FrontendOnly:      true,
 		},
-		{
-			Name:              "noBackdropBlur",
-			Description:       "Disables backdrop blur",
-			Stage:             FeatureStageExperimental,
-			Owner:             grafanaFrontendPlatformSquad,
-			HideFromAdminPage: true,
-			HideFromDocs:      true,
-			FrontendOnly:      true,
-		},
 		{
 			Name:              "alertingMigrationUI",
 			Description:       "Enables the alerting migration UI, to migrate datasource-managed rules to Grafana-managed rules",

pkg/services/featuremgmt/toggles_gen.csv

@@ -225,7 +225,6 @@ alertRuleRestore,preview,@grafana/alerting-squad,false,false,false
 grafanaManagedRecordingRulesDatasources,experimental,@grafana/alerting-squad,false,false,false
 infinityRunQueriesInParallel,privatePreview,@grafana/oss-big-tent,false,false,false
 inviteUserExperimental,experimental,@grafana/sharing-squad,false,false,true
-noBackdropBlur,experimental,@grafana/grafana-frontend-platform,false,false,true
 alertingMigrationUI,experimental,@grafana/alerting-squad,false,false,true
 unifiedStorageHistoryPruner,experimental,@grafana/search-and-storage,false,false,false
 azureMonitorLogsBuilderEditor,preview,@grafana/partner-datasources,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -911,10 +911,6 @@ const (
 	// Renders invite user button along the app
 	FlagInviteUserExperimental = "inviteUserExperimental"
 
-	// FlagNoBackdropBlur
-	// Disables backdrop blur
-	FlagNoBackdropBlur = "noBackdropBlur"
-
 	// FlagAlertingMigrationUI
 	// Enables the alerting migration UI, to migrate datasource-managed rules to Grafana-managed rules
 	FlagAlertingMigrationUI = "alertingMigrationUI"

pkg/services/featuremgmt/toggles_gen.json

@@ -2177,16 +2177,19 @@
     {
       "metadata": {
         "name": "noBackdropBlur",
-        "resourceVersion": "1743693517832",
-        "creationTimestamp": "2025-04-03T15:18:37Z"
+        "resourceVersion": "1744057771109",
+        "creationTimestamp": "2025-04-03T15:18:37Z",
+        "deletionTimestamp": "2025-04-08T09:27:30Z",
+        "annotations": {
+          "grafana.app/updatedTimestamp": "2025-04-07 20:29:31.109804663 +0000 UTC"
+        }
       },
       "spec": {
-        "description": "Disables backdrop blur",
-        "stage": "experimental",
+        "description": "Disables backdrop blur behind modals and drawers",
+        "stage": "GA",
         "codeowner": "@grafana/grafana-frontend-platform",
         "frontend": true,
-        "hideFromAdminPage": true,
-        "hideFromDocs": true
+        "expression": "true"
       }
     },
     {