dashboard/media: slightly improve media seeking

Still kinda buggy, but not as bad

modules/dashboard/Media.qml

@@ -283,13 +283,19 @@ Item {
             implicitWidth: controls.implicitWidth * 1.5
             implicitHeight: Appearance.padding.normal * 3
 
-            value: root.playerProgress
             onMoved: {
                 const active = Players.active;
                 if (active?.canSeek && active?.positionSupported)
                     active.position = value * active.length;
             }
 
+            Binding {
+                target: slider
+                property: "value"
+                value: root.playerProgress
+                when: !slider.pressed
+            }
+
             CustomMouseArea {
                 anchors.fill: parent
                 acceptedButtons: Qt.NoButton