footageviewer: direct in/out/markers to footage item rather than assuming a

sequence item

app/widget/timebased/timebased.h

@@ -83,6 +83,8 @@ protected:
 
   virtual void resizeEvent(QResizeEvent *event) override;
 
+  virtual TimelinePoints* ConnectTimelinePoints();
+
 protected slots:
   /**
    * @brief Slot to center the horizontal scroll bar on the playhead's current position
@@ -123,6 +125,8 @@ private:
 
   bool auto_max_scrollbar_;
 
+  TimelinePoints* points_;
+
 private slots:
   void UpdateMaximumScroll();