timeline: implement reveal in project action

app/panel/project/project.h

@@ -52,6 +52,11 @@ public:
 
   ProjectViewModel* model() const;
 
+  bool SelectItem(Node *n)
+  {
+    return explorer_->SelectItem(n);
+  }
+
   virtual void SelectAll() override;
   virtual void DeselectAll() override;
 

app/panel/timeline/timeline.cpp

@@ -34,7 +34,8 @@ TimelinePanel::TimelinePanel(QWidget *parent) :
   Retranslate();
 
   connect(tw, &TimelineWidget::BlockSelectionChanged, this, &TimelinePanel::BlockSelectionChanged);
-  connect(tw, &TimelineWidget::RequestCaptureStart, this, &TimelinePanel::RequestCaptureStart );
+  connect(tw, &TimelineWidget::RequestCaptureStart, this, &TimelinePanel::RequestCaptureStart);
+  connect(tw, &TimelineWidget::RevealViewerInProject, this, &TimelinePanel::RevealViewerInProject);
 }
 
 void TimelinePanel::SplitAtPlayhead()

app/panel/timeline/timeline.h

@@ -114,6 +114,8 @@ signals:
 
   void RequestCaptureStart(const TimeRange &time, const Track::Reference &track);
 
+  void RevealViewerInProject(ViewerOutput *r);
+
 };
 
 }