better ddcutil handling, revert to using onMoved brightness slider, fix osd region

Modules/Osd/Content.qml

@@ -102,15 +102,13 @@ Item {
 					to: 1.0
 					value: root.brightness
 
-					onPressedChanged: {
-						if (!pressed) {
-							if (Config.osd.allMonBrightness) {
-								for (const mon of Brightness.monitors) {
-									mon.setBrightness(value);
-								}
-							} else {
-								root.monitor?.setBrightness(value);
+					onMoved: {
+						if (Config.osd.allMonBrightness) {
+							for (const mon of Brightness.monitors) {
+								mon.setBrightness(value);
 							}
+						} else {
+							root.monitor?.setBrightness(value);
 						}
 					}
 				}

Modules/Polkit/Polkit.qml

@@ -28,9 +28,7 @@ Scope {
 		visible: false
 
 		Connections {
-			target: root
-
-			onShouldShowChanged: {
+			function onShouldShowChanged(): void {
 				if (root.shouldShow) {
 					panelWindow.visible = true;
 					openAnim.start();
@@ -38,6 +36,8 @@ Scope {
 					closeAnim.start();
 				}
 			}
+
+			target: root
 		}
 
 		Anim {

Modules/Wallpaper/WallBackground.qml

@@ -12,10 +12,10 @@ Item {
 	id: root
 
 	property bool completed
-	property real cropHeight: displayData.height ?? 1.0
-	property real cropWidth: displayData.width ?? 1.0
-	property real cropX: displayData.x ?? 0.0
-	property real cropY: displayData.y ?? 0.0
+	property real cropHeight: displayData?.height ?? 1.0
+	property real cropWidth: displayData?.width ?? 1.0
+	property real cropX: displayData?.x ?? 0.0
+	property real cropY: displayData?.y ?? 0.0
 	property WallpaperImage current
 	readonly property var displayData: Wallpapers.getCrop(screen.name)
 	required property ShellScreen screen