Update new-user-dialog.component.html

Author: polterguy

frontend/src/app/components/protected/manage/user-and-roles/components/new-user-dialog/new-user-dialog.component.html

@@ -22,7 +22,6 @@ <h3 mat-dialog-title>Add user</h3>
             autocomplete="off"
             placeholder="Username"
             formControlName="username"
-            [pattern]="CommonRegEx.name"
             required />
           <mat-error>{{CommonErrorMessages.username}}</mat-error>
         </mat-form-field>