feat: button is working modifier (#471)

* feat: button is working modifier

* feat: adding loader param to button

* fix: only show spinner when type is button or submit

source/php/Component/Button/button.blade.php

@@ -1,6 +1,8 @@
 <{{$componentElement}} class="{{ $class }}" target="{{ $target }}" {!! $attribute !!}>   
     @if(!$isLabel) <{{$labelElement}} class="{{$baseClass}}__label"> @endif
-
+        @if ($type === 'submit' || $type === 'button')
+            <span class="{{$baseClass}}__loader"></span>
+        @endif
         @if($icon)
             <span class="{{$baseClass}}__label-icon {{ $classListIcon }}">
                 @icon(['icon' => $icon, 'size' => $size, 'attributeList' => ['aria-hidden' => 'true']])