message: fix(popover): prevent ng router active link double ngOnInit issue
diff: @@ -54,6 +54,7 @@ export class PopoverDirective implements OnInit, OnDestroy {
  @Output() public onHidden: EventEmitter<any>;
  private _popover: ComponentLoader<PopoverContainerComponent>;
  + private _isInited = false;
  public constructor(_elementRef: ElementRef,
  _renderer: Renderer,
  @@ -113,6 +114,12 @@ export class PopoverDirective implements OnInit, OnDestroy {
  }
  public ngOnInit(): any {
  + // fix: seems there are an issue with `routerLinkActive`
  + // which result in duplicated call ngOnInit without call to ngOnDestroy
  + // read more: https://github.com/valor-software/ngx-bootstrap/issues/1885
  + if (this._isInited) { return; }
  + this._isInited = true;
  +
  this._popover.listen({
  triggers: this.triggers,
  show: () => this.show()
  