trigger the autocompleter on input focus when field is not empty

frontend/src/app/components/global-search/global-search-input.component.ts

@@ -191,6 +191,12 @@ export class GlobalSearchInputComponent implements OnDestroy {
         return this.renderWorkPackageItem(item.item as WorkPackageResource).appendTo(ul);
       }
     };
+
+    this.$input.on('focus', () => {
+      if (this.searchValue.length > 0) {
+        this.$input.autocomplete('search', this.searchValue);
+      }
+    });
   }
 
   // detect if click is outside or inside the element