ENGCOM-5840: Notification counter design issue #23473 #24589

 - Merge Pull Request #24589 from thurow/magento2:hotfix/notification-admin-counter
 - Merged commits:
   1. d009e26
   2. 3187c61
   3. 07d6cb9

Author: magento-engcom-team

app/design/adminhtml/Magento/backend/Magento_Backend/web/css/source/module/header/actions-group/_notifications.less

@@ -97,13 +97,14 @@
         display: inline-block;
         font-size: @notifications__font-size;
         font-weight: @font-weight__bold;
-        height: 18px;
+        height: 20px;
         left: 50%;
+        line-height: 20px;
         margin-left: .3em;
         margin-top: -1.1em;
-        min-width: 18px;
-        padding: .3em .5em;
+        min-width: 20px;
         position: absolute;
+        text-align: center;
         top: 50%;
     }
 }