[v11.0.x] datatrails: hide "add to filter" button when there is no label value to add to filter (#85502)

datatrails: hide "add to filter" button when there is no label value to add to filter (#85270)

fix: hide add to filters button when it won't work
(cherry picked from commit 2ecc1bb646)

Co-authored-by: Darren Janeczek <38694490+darrenjaneczek@users.noreply.github.com>

public/app/features/trails/ActionTabs/AddToFiltersGraphAction.tsx

@@ -41,6 +41,15 @@ export class AddToFiltersGraphAction extends SceneObjectBase<AddToFiltersGraphAc
   };
 
   public static Component = ({ model }: SceneComponentProps<AddToFiltersGraphAction>) => {
+    const state = model.useState();
+    const labels = state.frame.fields[1]?.labels || {};
+
+    const canAddToFilters = Object.keys(labels).length !== 0;
+
+    if (!canAddToFilters) {
+      return null;
+    }
+
     return (
       <Button variant="secondary" size="sm" fill="solid" onClick={model.onClick}>
         Add to filters