Fix datepicker not working when toggling disabled state

packages/bbui/src/Form/Core/DatePicker.svelte

@@ -156,8 +156,8 @@
         <input
           data-input
           type="text"
-          {disabled}
           class="spectrum-Textfield-input spectrum-InputGroup-input"
+          class:is-disabled={disabled}
           {placeholder}
           {id}
           {value}
@@ -167,7 +167,7 @@
         type="button"
         class="spectrum-Picker spectrum-Picker--sizeM spectrum-InputGroup-button"
         tabindex="-1"
-        {disabled}
+        class:is-disabled={disabled}
         class:is-invalid={!!error}
         on:click={flatpickr?.open}
       >
@@ -212,4 +212,7 @@
   :global(.flatpickr-calendar) {
     font-family: "Source Sans Pro", sans-serif;
   }
+  .is-disabled {
+    pointer-events: none !important;
+  }
 </style>