feat: hide revert button in ACP > Privileges until privileges change

public/src/admin/manage/privileges.js

@@ -91,6 +91,15 @@ define('admin/manage/privileges', [
 			throwConfirmModal('discard', Privileges.discard);
 		});
 
+		// Expose discard button as necessary
+		const containerEl = document.querySelector('.privilege-table-container');
+		containerEl.addEventListener('change', (e) => {
+			const subselector = e.target.closest('td[data-privilege] input');
+			if (subselector) {
+				document.getElementById('discard').style.display = containerEl.querySelectorAll('td[data-delta]').length ? 'unset' : 'none';
+			}
+		});
+
 		$('.privilege-table-container').on('click', '[data-action="search.user"]', Privileges.addUserToPrivilegeTable);
 		$('.privilege-table-container').on('click', '[data-action="search.group"]', Privileges.addGroupToPrivilegeTable);
 		$('.privilege-table-container').on('click', '[data-action="copyToChildren"]', function () {

src/views/admin/manage/privileges.tpl

@@ -22,8 +22,8 @@
 </div>
 
 <div class="floating-button">
-	<button id="discard" class="mdl-button mdl-js-button mdl-button--fab mdl-js-ripple-effect mdl-button--colored">
-		<i class="material-icons">delete</i>
+	<button id="discard" class="mdl-button mdl-js-button mdl-button--fab mdl-js-ripple-effect mdl-button--colored" style="display: none;">
+		<i class="material-icons">undo</i>
 	</button>
 
 	<button id="save" class="mdl-button mdl-js-button mdl-button--fab mdl-js-ripple-effect mdl-button--colored primary">