Fixed search facet deadlock

Also fixed minor issue in MetadataService, but this doesn't cause any issues in the current code

(cherry picked from commit 446280b)

Author: alexandrevryghem

src/app/core/metadata/metadata.service.ts

@@ -27,7 +27,7 @@ export class MetadataService {
    * Returns undefined otherwise.
    */
   public virtualValue(metadataValue: MetadataValue | undefined): string {
-    if (this.isVirtual) {
+    if (this.isVirtual(metadataValue)) {
       return metadataValue.authority.substring(metadataValue.authority.indexOf(VIRTUAL_METADATA_PREFIX) + VIRTUAL_METADATA_PREFIX.length);
     } else {
       return undefined;

src/app/shared/input-suggestions/input-suggestions.component.ts

@@ -182,11 +182,11 @@ export class InputSuggestionsComponent implements ControlValueAccessor, OnChange
   }
 
   /**
-   * When any key is pressed (except for the Enter button) the query input should move to the input field
+   * When any key is pressed (except for the Enter & Tab button) the query input should move to the input field
    * @param {KeyboardEvent} event The keyboard event
    */
   onKeydown(event: KeyboardEvent) {
-    if (event.key !== 'Enter') {
+    if (event.key !== 'Enter' && event.key !== 'Tab') {
       this.queryInput.nativeElement.focus();
     }
   }