fix for 12.x branch

config.json

@@ -3,9 +3,9 @@
   "positionX": "right",
   "positionY": "bottom",
   "layer": "overlay",
-  "control-center-layer": "top",
+  "control-center-layer": "overlay",
   "layer-shell": true,
-  "cssPriority": "application",
+  "cssPriority": "user",
   "control-center-margin-top": 5,
   "control-center-margin-bottom": 20,
   "control-center-margin-right": 0,
@@ -17,7 +17,7 @@
   "notification-body-image-width": 200,
   "timeout": 10,
   "timeout-low": 5,
-  "timeout-critical": 0,
+  "timeout-critical": 10,
   "fit-to-screen": true,
   "relative-timestamps": true,
   "control-center-width": 500,
@@ -36,6 +36,11 @@
       "state": "ignored",
       "urgency": "Low",
       "desktop-entry": "com.spotify.Client"
+    },
+    "fractal": {
+        "state": "transient",
+        "override-urgency": "Normal",
+        "desktop-entry": "org.gnome.Fractal"
     }
   },
   "widgets": [

style.css

@@ -274,7 +274,6 @@
 .control-center .control-center-list {
   /* List of notifications */
   background: transparent;
-  margin-bottom: 50px;
 }
 
 .control-center .control-center-list .notification {