task_tracker/web/angular/src/app/manager-select/manager-select.component.html

<mat-form-field appearance="outline" style="margin-top: 1em">
    <mat-label>{{"project.manager_select" | translate}}</mat-label>
    <mat-select [(ngModel)]="manager" (selectionChange)="managerChange.emit($event.value)"
                [placeholder]="'perms.manager_select' | translate"
                (opened)="loadManagerList()">
        <mat-select-trigger></mat-select-trigger>
        <mat-option disabled *ngIf="managerList === undefined">
            {{"project_select.loading" | translate}}
        </mat-option>
        <mat-option *ngFor="let m of managerList" [value]="m">
            <mat-icon *ngIf="m.tracker_admin">supervisor_account</mat-icon>
            <mat-icon *ngIf="!m.tracker_admin">person</mat-icon>
            {{m.username}}
        </mat-option>
    </mat-select>
</mat-form-field>