[BF] fix closing stacked modals

Author: tswonke

resources/views/modal/inc/form_save_buttons.blade.php

@@ -7,7 +7,7 @@
         <span data-value="{{ $saveAction['active']['value'] }}">{{ $saveAction['active']['label'] }}</span>
     </button>
 
-    <button class="btn btn-default" type="button" data-dismiss="modal">
+    <button class="btn btn-default" type="button" data-toggle="modal" data-target="#{{ $entity }}_modal">
         <span class="fa fa-ban"></span> {{ trans('backpack::crud.cancel') }}
     </button>
-</div>
+</div>

resources/views/modal/modal_layout.blade.php

@@ -3,7 +3,7 @@
     {{--'files'=>$crud->hasUploadFields('create')])--}}
     {{ csrf_field() }}
 <div class="modal-header">
-    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+    <button type="button" class="close" data-toggle="modal" data-target="#{{ $entity }}_modal" aria-label="Close">
         <span aria-hidden="true">&times;</span>
     </button>
     @yield('header')