message: fix "Sending" button not staying inline
diff: <div class="uk-text-right@s nlt-button-group">
  <button (click)="activePanel = 'send'" class="uk-button uk-button-danger uk-width-1-1@s uk-width-auto@m">Cancel</button>
  <button *ngIf="!confirmingTransaction" class="uk-button uk-button-primary uk-width-1-1@s uk-width-auto@m" (click)="confirmTransaction()">Confirm & Send</button>
  - <button *ngIf="confirmingTransaction" class="uk-button uk-button-secondary uk-disabled nlt-icon-button uk-width-1-1@s uk-width-auto@m"><span class="spinner" uk-spinner="ratio: 0.5;"></span> Sending</button>
  + <button *ngIf="confirmingTransaction" class="uk-button uk-button-secondary uk-disabled nlt-icon-button uk-width-1-1@s uk-width-auto@m"
  + style="display: inline-flex;"
  + ><span class="spinner" uk-spinner="ratio: 0.5;"></span> Sending</button>
  </div>
  </div>
  </div>
  