Fix click in timeline broken after switching to another app with spacer tool active

src/timeline2/view/qml/timeline.qml

@@ -367,7 +367,7 @@ Rectangle {
             tentativeClip = getItemAtPos(currentMouseTrack, (mousePos.x - trackHeaders.width + scrollView.contentX), false)
         }
 
-        if (tentativeClip && tentativeClip.clipId && tentativeClip.doesContainMouse(root.mapToItem(tentativeClip, mousePos.x, mousePos.y))) {
+        if (tentativeClip && tentativeClip.clipId && tentativeClip.doesContainMouse(root.mapToItem(tentativeClip, mousePos.x, mousePos.y)) && root.activeTool !== ProjectTool.SpacerTool) {
             dragProxy.draggedItem = tentativeClip.clipId
             var tk = controller.getItemTrackId(tentativeClip.clipId)
             dragProxy.x = tentativeClip.x