[refactor] Capitalise 'More' text using css rather than rendering uppercase text in html

client/scss/components/_listing.scss

@@ -509,6 +509,10 @@ footer.bulk-actions-choices {
             color: $color-teal;
         }
 
+        .c-dropdown__button {
+            text-transform: uppercase;
+        }
+
         &.is-open {
             ul.u-toggle {
                 display: flex;

wagtail/admin/templatetags/wagtailadmin_tags.py

@@ -533,7 +533,7 @@ def page_bulk_action_choices(context):
 
     if bulk_action_more_list:
         more_button = ButtonWithDropdown(
-            label=_("MORE"),
+            label=_("More"),
             attrs={
                 'target': '_blank', 'rel': 'noopener noreferrer',
                 'title': _("View more bulk actions")