keyframes: implemented copying/pasting

app/panel/timebased/timebased.cpp

@@ -216,4 +216,19 @@ void TimeBasedPanel::DeleteSelected()
   GetTimeBasedWidget()->DeleteSelected();
 }
 
+void TimeBasedPanel::CutSelected()
+{
+  GetTimeBasedWidget()->CopySelected(true);
+}
+
+void TimeBasedPanel::CopySelected()
+{
+  GetTimeBasedWidget()->CopySelected(false);
+}
+
+void TimeBasedPanel::Paste()
+{
+  GetTimeBasedWidget()->Paste();
+}
+
 }

app/panel/timebased/timebased.h

@@ -100,6 +100,12 @@ public:
 
   virtual void DeleteSelected() override;
 
+  virtual void CutSelected() override;
+
+  virtual void CopySelected() override;
+
+  virtual void Paste() override;
+
 public slots:
   void SetTimebase(const rational& timebase);