Fix theming on webhook form when there is no bootstrap theme

templates/CRM/Stripe/Form/UpdateWebhook.tpl

-{if $isAllOk}
-  <div class="alert alert-success">{$intro}</div>
-{/if}
-{if $shouldOfferToFix}
-    <h3>Problems discovered:</h3>
-  <div class="alert alert-warning">
-    <ul>
-    {foreach from=$messages item=message}
-      <li>{$message.title}: {$message.message}</li>
-    {/foreach}
-    </ul>
-  </div>
-  <div class="alert alert-info">
-    <p>Please click the Update / Create webhook button to
-      attempt to fix.</p>
-    <p>This will attempt to check and correct your Stripe webhooks. Note: do not
-    run this in a development environment unless you want a webhook set up that
-    points to your development domain(!).</p>
-  </div>
-{/if}
+<div class="crm-block crm-content-block">
+    {if $isAllOk}
+      <div class="alert alert-success">{$intro}</div>
+    {/if}
+    {if $shouldOfferToFix}
+      <div class="alert alert-warning status crm-warning">
+        <h3>Problems discovered:</h3>
+        <ul>
+            {foreach from=$messages item=message}
+              <li>{$message.title}: {$message.message}</li>
+            {/foreach}
+        </ul>
+      </div>
+      <div class="alert alert-info status help">
+        <p>Please click the Update / Create webhook button to
+          attempt to fix.</p>
+        <p>This will attempt to check and correct your Stripe webhooks. Note: do not
+          run this in a development environment unless you want a webhook set up that
+          points to your development domain(!).</p>
+      </div>
+    {/if}
 
-{if $isStillBad}
-  <div class="alert alert-danger">
-    <h3>There were errors updating the webhook(s):</h3>
-    <ul>
-        {foreach from=$messages item=message}
-          <li>{$message.title}: {$message.message}</li>
-        {/foreach}
-    </ul>
-  </div>
-  <div class="alert alert-info">
-    The easiest way to fix this, is to
-    delete your webhooks from your Stripe account(s) and then revisit this page
-    to recreate them correctly.
-  </div>
-{/if}
-{* FOOTER *}
-{if $shouldOfferToFix || $isStillBad}
-  <div class="crm-submit-buttons">
-  {include file="CRM/common/formButtons.tpl" location="bottom"}
-  </div>
-{/if}
+    {if $isStillBad}
+      <div class="alert alert-danger status crm-error">
+        <h3>There were errors updating the webhook(s):</h3>
+        <ul>
+            {foreach from=$messages item=message}
+              <li>{$message.title}: {$message.message}</li>
+            {/foreach}
+        </ul>
+      </div>
+      <div class="alert alert-info status help">
+        The easiest way to fix this, is to
+        delete your webhooks from your Stripe account(s) and then revisit this page
+        to recreate them correctly.
+      </div>
+    {/if}
+    {* FOOTER *}
+    {if $shouldOfferToFix || $isStillBad}
+      <div class="crm-submit-buttons">
+          {include file="CRM/common/formButtons.tpl" location="bottom"}
+      </div>
+    {/if}
+</div>
\ No newline at end of file

[Rich]

Thanks for this, I forget which classes are bootstrap, Drupal or Civi!