message: fix(demo): fix close btns in nested modals
diff: </div>
  <div class="modal-body">
  This is static modal <br>
  - <button type="button" class="btn btn-primary" (click)="childModall.show()">Open third modal</button>
  + <button type="button" class="btn btn-primary" (click)="thirdModal.show()">Open third modal</button>
  </div>
  </div>
  </div>
  </div>
  -<div class="modal fade" bsModal #childModall="bs-modal" tabindex="-1" role="dialog" aria-hidden="true">
  +<div class="modal fade" bsModal #thirdModal="bs-modal" tabindex="-1" role="dialog" aria-hidden="true">
  <div class="modal-dialog modal-sm">
  <div class="modal-content">
  <div class="modal-header">
  <h4 class="modal-title pull-left">Third modal</h4>
  - <button type="button" class="close pull-right" aria-label="Close" (click)="childModal.hide()">
  + <button type="button" class="close pull-right" aria-label="Close" (click)="thirdModal.hide()">
  <span aria-hidden="true">&times;</span>
  </button>
  </div>
  