Update login logic

Remove unnecassary redirect on login failed
Add ngSubmit functionality to enable keyboard submit

src/app/app.module.ts

@@ -107,7 +107,7 @@ import { AuthenticationGuard } from './authentication.guard';
   providers: [
     NotificationService,
     AuthenticationService,
-    AuthenticationGuard,
+    AuthenticationGuard
   ],
   bootstrap: [AppComponent]
 })

src/app/login/login.component.html

-<form>
+<form (ngSubmit)="login(userName.value, userPassword.value)">
   <mat-form-field class="input-block">
     <input matInput #userName placeholder="Username" [formControl]="usernameFormControl" [errorStateMatcher]="matcher" name="username" />
     <mat-error *ngIf="usernameFormControl.hasError('required')">Username is <strong>required</strong>.</mat-error>

src/app/login/login.component.ts

@@ -8,7 +8,7 @@ import { FormControl, FormGroupDirective, NgForm, ReactiveFormsModule, Validator
 export class LoginErrorStateMatcher implements ErrorStateMatcher {
   isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {
     const isSubmitted = form && form.submitted;
-    return !!(control && control.invalid && (control.dirty || control.touched || isSubmitted));
+    return (control && control.invalid && (control.dirty || control.touched || isSubmitted));
   }
 }
 
@@ -43,7 +43,6 @@ export class LoginComponent implements OnInit {
           this.router.navigate(['rooms']);
         } else {
           this.notificationService.show('Login failed!');
-          this.router.navigate(['home']);
         }
       });
     }