simplify things by moving popups into a new layer

modules/overlays/Bottom.qml

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+import Quickshell.Wayland
+import Quickshell
+import QtQuick
+import qs.settings
+
+Variants {
+    model: Quickshell.screens
+    delegate: WlrLayershell {
+        id: root
+        layer: WlrLayer.Background
+        required property ShellScreen modelData
+        screen: modelData
+        exclusionMode: ExclusionMode.Ignore
+
+        anchors {
+            top: true
+            bottom: true
+            left: true
+            right: true
+        }
+        Image {
+            cache: false
+            anchors.fill: parent
+            source: Qt.resolvedUrl(Config.cfg.wallpaper.wallpaper)
+        }
+    }
+}