qt: fix middle mouse wheel rewind issue

modules/gui/qt/player/qml/SliderBar.qml

@@ -276,6 +276,40 @@ T.ProgressBar {
                 }
             }
         }
+
+        WheelHandler {
+            orientation: Qt.Vertical | Qt.Horizontal
+
+            acceptedDevices: PointerDevice.AllDevices
+
+            onWheel: (wheel) => {
+                wheelToVLC.qmlWheelEvent(wheel)
+                wheel.accepted = true
+            }
+        }
+
+        WheelToVLCConverter {
+            id: wheelToVLC
+
+            function handleVertical(steps: int) {
+                if (steps > 0)
+                    Player.jumpFwd()
+                else
+                    Player.jumpBwd()
+            }
+
+            function handleHorizontal(steps: int) {
+                if (steps > 0)
+                    Player.jumpBwd()
+                else
+                    Player.jumpFwd()
+            }
+
+            Component.onCompleted: {
+                wheelUpDown.connect(wheelToVLC, wheelToVLC.handleVertical)
+                wheelLeftRight.connect(wheelToVLC, wheelToVLC.handleHorizontal)
+            }
+        }
     }
 
     background: Item {