message: Better button text in sweeper
diff: </div>
  <div class="uk-width-1-1 narrow-div">
  - <button *ngIf="!sweeping" class="uk-button uk-button-primary uk-width-1-1" type="button" [disabled]="!settings.settings.serverAPI" (click)="sweep()">START SWEEPING {{!settings.settings.serverAPI ? '(Nault Offline)':''}}</button>
  + <button *ngIf="!sweeping" class="uk-button uk-button-primary uk-width-1-1" type="button" [disabled]="!settings.settings.serverAPI" (click)="sweep()">{{settings.settings.serverAPI ? 'START SWEEPING':'NOT AVAILABLE IN OFFLINE MODE'}}</button>
  <button *ngIf="sweeping" class="uk-button uk-button-primary uk-disabled uk-width-1-1" type="button"><span class="uk-margin-right" uk-spinner></span> PROCESSING...</button>
  </div>
  </div>
  