tasks-create.html

<ion-header>

  <ion-navbar>
    <ion-title>New Task</ion-title>
    <ion-buttons end>
      <button ion-button [attr.icon-only]="!isAndroid ? null : ''" (click)="cancel()">
        <span color="primary" showWhen="ios">
          Cancel
        </span>
        <ion-icon name="md-close" showWhen="core,android,windows"></ion-icon>
      </button>
    </ion-buttons>
  </ion-navbar>

</ion-header>