Fix timeline scrolling broken after opening a widget from timeline menu, like edit clip duration

src/timeline2/view/qml/timeline.qml

@@ -319,6 +319,7 @@ Rectangle {
         dragProxy.width = 0
         dragProxy.height = 0
         dragProxy.verticalOffset = 0
+        root.autoScrolling = timeline.autoScroll
     }
 
     function regainFocus(mousePos) {
@@ -362,6 +363,7 @@ Rectangle {
                 endDrag()
             }
         }
+        root.autoScrolling = timeline.autoScroll
     }
 
     function getAudioTracksCount(){