Remove "Add metric" button from custom dashboards

app/assets/javascripts/monitoring/components/dashboard.vue

@@ -229,7 +229,12 @@ export default {
       return !this.showEmptyState && this.rearrangePanelsAvailable;
     },
     addingMetricsAvailable() {
-      return IS_EE && this.canAddMetrics && !this.showEmptyState;
+      return (
+        IS_EE &&
+        this.canAddMetrics &&
+        !this.showEmptyState &&
+        this.firstDashboard === this.selectedDashboard
+      );
     },
     hasHeaderButtons() {
       return (

ee/changelogs/unreleased/211648-remove-add-metric-button-from-custom-dashboard.yml

+---
+title: Remove Add Metric button from custom dashboards
+merge_request: 29036
+author:
+type: changed