Add scrolling for volume icon

Bar/Modules/Volume.qml

@@ -41,4 +41,20 @@ Item {
             pillIndicator.show()
         }
     }
+
+    MouseArea {
+        anchors.fill: parent
+        hoverEnabled: true
+        acceptedButtons: Qt.NoButton // Accept wheel events only
+        propagateComposedEvents: true
+        onWheel: {
+            if (!shell) return;
+            let step = 5;
+            if (wheel.angleDelta.y > 0) {
+                shell.volume = Math.min(100, shell.volume + step);
+            } else if (wheel.angleDelta.y < 0) {
+                shell.volume = Math.max(0, shell.volume - step);
+            }
+        }
+    }
 }