make screen corner configurable

.config/quickshell/modules/common/ConfigOptions.qml

@@ -3,6 +3,10 @@ import Quickshell
 pragma Singleton
 
 Singleton {
+    property QtObject appearance: QtObject {
+        property int fakeScreenRounding: 1 // 0: None | 1: Always | 2: When not fullscreen
+    }
+
     property QtObject bar: QtObject {
         property int workspacesShown: 10
         property int batteryLowThreshold: 20
@@ -11,6 +15,7 @@ Singleton {
             property bool alwaysShowCpu: false
         }
     }
+
     property QtObject resources: QtObject {
         property int updateInterval: 3000
     }

.config/quickshell/modules/screenCorners/ScreenCorners.qml

@@ -15,7 +15,7 @@ Scope {
 
         PanelWindow {
             id: barRoot
-            visible: !activeWindow?.fullscreen
+            visible: (ConfigOptions.appearance.fakeScreenRounding === 1 || (ConfigOptions.appearance.fakeScreenRounding === 2 && !activeWindow?.fullscreen))
 
             property var modelData
 
@@ -25,6 +25,7 @@ Scope {
                 item: null
             }
             WlrLayershell.namespace: "quickshell:screenCorners"
+            WlrLayershell.layer: WlrLayer.Overlay
             color: "transparent"
 
             anchors {