use ->getSlug() everywhere in column selection

Author: inmanturbo

resources/views/components/tools/toolbar.blade.php

@@ -754,7 +754,7 @@ class="px-2 {{ $loop->last ? 'mb-0' : 'mb-1' }}"
                                                 wire:target="selectedColumns"
                                                 wire:loading.attr="disabled"
                                                 type="checkbox"
-                                                value="{{ $column->getField() }}"
+                                                value="{{ $column->getSlug() }}"
                                             />
                                             <span class="ml-2">{{ $column->getTitle() }}</span>
                                         </label>
@@ -813,4 +813,4 @@ class="d-block">
 
 @if ($component->hasConfigurableAreaFor('after-toolbar'))
     @include($component->getConfigurableAreaFor('after-toolbar'), $component->getParametersForConfigurableArea('after-toolbar'))
-@endif
+@endif