this.userService.welcome().subscribe(resp => {
      this.loggedIn = !!resp.loggedIn;
      this.loginURL = resp.loginURL;
      this.logoutURL = resp.logoutURL;

      if (!resp.loggedIn) {
        this.sidenavView.open();
      }
    });

 openGitHub() {
   this.sideNav.close();
   window.open('https://github.com/lukaszkostrzewa/graphy/issues', '_blank');
 }

 showShortcutsDialog() {
   this.sideNav.close();
   this.dialog.open(ShortcutsDialogComponent, {width: '600px'});
 }

 this.dialog.open(NewDialogComponent).afterClosed().subscribe((result: boolean) => {
   if (result) {
     this.graphComponent.newGraph();
     this.sideNav.close();
   }
 });

this.toggleService.subscribe(() => this.sidenav.toggle())