feat(typeahead): add more on blur logic (#5629)

Co-authored-by: dmitry-zhemchugov <44227371+dmitry-zhemchugov@users.noreply.github.com>

src/typeahead/typeahead.directive.ts

@@ -290,6 +290,13 @@ export class TypeaheadDirective implements OnInit, OnDestroy {
     if (this._container && !this._container.isFocused) {
       this.typeaheadOnBlur.emit(this._container.active);
     }
+
+    if (!this.container && this._matches.length === 0) {
+    this.typeaheadOnBlur.emit(new TypeaheadMatch(
+      this.element.nativeElement.value,
+      this.element.nativeElement.value,
+      false));
+    }
   }
 
   @HostListener('keydown', ['$event'])
@@ -299,6 +306,11 @@ export class TypeaheadDirective implements OnInit, OnDestroy {
       return;
     }
 
+    /* tslint:disable-next-line: deprecation */
+    if (event.keyCode === 9 || event.key === 'Tab') {
+      this.onBlur();
+    }
+
     /* tslint:disable-next-line: deprecation */
     if (event.keyCode === 9 || event.key === 'Tab' || event.keyCode === 13 || event.key === 'Enter') {
       event.preventDefault();