chore: fixed receptor rendering condition

src/atlasComponents/regionalFeatures/bsFeatures/receptor/entry/entry.template.html

-<mat-select [(value)]="selectedREntryId">
+<!-- potential selector for receptor data -->
+<mat-select class="invisible" [(value)]="selectedREntryId">
   <mat-option *ngFor="let rec of receptorsSummary$ | async"
     [value]="rec['@id']">
     {{ rec.name }}

src/atlasComponents/regionalFeatures/bsFeatures/receptor/hasReceptor.directive.ts

@@ -21,7 +21,7 @@ export class BsFeatureReceptorDirective extends BsRegionInputBase implements OnD
     switchMap(val => merge(
       of(null),
       this.featureReceptorService.getReceptorRegionalFeature(val).pipe(
-        mapTo(true),
+        map(arr => arr.length > 0),
         catchError(() => of(false))
       )
     )),