add missing clipping for scrollable content

.config/quickshell/modules/sidebarRight/CenterWidgetGroup.qml

@@ -63,6 +63,7 @@ Rectangle {
                 root.currentTab = currentIndex
             }
 
+            clip: true
             layer.enabled: true
             layer.effect: OpacityMask {
                 maskSource: Rectangle {

.config/quickshell/modules/sidebarRight/notifications/NotificationList.qml

@@ -72,6 +72,7 @@ Item {
         anchors.bottom: statusRow.top
         contentHeight: columnLayout.height
 
+        clip: true
         layer.enabled: true
         layer.effect: OpacityMask {
             maskSource: Rectangle {

.config/quickshell/modules/sidebarRight/todo/TaskList.qml

@@ -21,6 +21,7 @@ Item {
         anchors.fill: parent
         contentHeight: columnLayout.height
 
+        clip: true
         layer.enabled: true
         layer.effect: OpacityMask {
             maskSource: Rectangle {

.config/quickshell/modules/sidebarRight/volumeMixer/VolumeMixer.qml

@@ -40,6 +40,7 @@ Item {
                 anchors.fill: parent
                 contentHeight: volumeMixerColumnLayout.height
 
+                clip: true
                 layer.enabled: true
                 layer.effect: OpacityMask {
                     maskSource: Rectangle {