message: moved getActiveRefreshTime() to template
diff: <span class="times-text">Refresh now <i class="fa fa-refresh"></i></span>
  </button>
  <button class="btn btn-outline-primary times" id="refreshMenu" ngbDropdownToggle>
  - <i [ngClass]="classTime()" ></i>&nbsp; <span class="times-text" [innerHTML]="getActiveRefreshTime()"></span>
  + <i [ngClass]="classTime()" ></i>&nbsp; <span class="times-text">{{getActiveRefreshTime()}}</span>
  </button>
  <div ngbDropdownMenu aria-labelledby="refreshMenu" aria-expanded="true">
  <span class="dropdown-header">Refresh times (in seconds)</span>
  