message: fix blank fields in settings
diff: </a>
  </div>
  - <div>
  + <div *ngIf="linkFields.apiDocLink.href">
  <h5 [translate]="linkFields.apiDocLink.title"></h5>
  <a
  target="_blank"
  </a>
  </div>
  - <div>
  + <div *ngIf="inputFields.apiKey.value">
  <h5 [translate]="inputFields.apiKey.title"></h5>
  <cs-input-group>
  <mdl-textfield
  </mdl-tooltip>
  </div>
  - <div>
  + <div *ngIf="inputFields.apiSecretKey.value">
  <h5 [translate]="inputFields.apiSecretKey.title"></h5>
  <cs-input-group>
  <mdl-textfield
  