Website: Product Configurator and Bootstrap 4 (#15965)

- Refactored Homepage with customisable Hero Section
- New Homepage Section to add content on Homepage as cards or using Custom HTML
- Products page at "/all-products" with customisable filters
- Item Configure dialog to find an Item Variant filtered by attribute values
- Contact Us dialog on Item page
- Customisable Item page content using the Website Content field
diff --git a/erpnext/templates/pages/task_info.html b/erpnext/templates/pages/task_info.html
index 6cfac28..6cd6a7e 100644
--- a/erpnext/templates/pages/task_info.html
+++ b/erpnext/templates/pages/task_info.html
@@ -20,7 +20,7 @@
 		<div class="page-header-actions-block" data-html-block="header-actions">
 			<button type="submit" class="btn btn-primary btn-sm btn-form-submit">
 	    		{{ __("Update") }}</button>
-	    		<a href="tasks" class="btn btn-default btn-sm">
+	    		<a href="tasks" class="btn btn-light btn-sm">
 	    		{{ __("Cancel") }}</a>
 		</div>
     </div>
@@ -91,7 +91,7 @@
 		{% endfor %}
 	</div>
 	<div class="comment-form-wrapper">
-		<a class="add-comment btn btn-default btn-sm">{{ __("Add Comment") }}</a>
+		<a class="add-comment btn btn-light btn-sm">{{ __("Add Comment") }}</a>
 		<div style="display: none;" id="comment-form">
 			<p>{{ __("Add Comment") }}</p>
 			<form>