Revert "show lockscreen UI on mouse move" behavior

It was removed among other changes. Probably by accident.

Amends 3422348c

lookandfeel/contents/lockscreen/LockScreenUi.qml

@@ -109,6 +109,7 @@ PlasmaCore.ColorScope {
         hoverEnabled: true
         drag.filterChildren: true
         onPressed: uiVisible = true;
+        onPositionChanged: uiVisible = true;
         onUiVisibleChanged: {
             if (blockUI) {
                 fadeoutTimer.running = false;