QmlDesigner: Remove the custom notification "INSERT_KEYFRAME"

Adding a keyframe can be done directly in the PropertyEditor.

Change-Id: I38fa87a8bcf4f551890c4ada748301cdeea9f165
Reviewed-by: Knud Dollereder <knud.dollereder@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/propertyeditor/propertyeditorcontextobject.cpp

@@ -28,10 +28,11 @@
 
 #include <abstractview.h>
 #include <nodemetainfo.h>
-#include <qmldesignerplugin.h>
-#include <qmlobjectnode.h>
-#include <qmlmodelnodeproxy.h>
 #include <rewritingexception.h>
+#include <qmldesignerplugin.h>
+#include <qmlmodelnodeproxy.h>
+#include <qmlobjectnode.h>
+#include <qmltimeline.h>
 
 #include <coreplugin/messagebox.h>
 #include <utils/algorithm.h>
@@ -310,9 +311,12 @@ void PropertyEditorContextObject::insertKeyframe(const QString &propertyName)
 
     ModelNode selectedNode = rewriterView->selectedModelNodes().constFirst();
 
-    rewriterView->emitCustomNotification("INSERT_KEYFRAME",
-                                         { selectedNode },
-                                         { propertyName });
+    QmlTimeline timeline = rewriterView->currentTimeline();
+
+    QTC_ASSERT(timeline.isValid(), return );
+    QTC_ASSERT(selectedNode.isValid(), return );
+
+    timeline.insertKeyframe(selectedNode, propertyName.toUtf8());
 }
 
 int PropertyEditorContextObject::majorVersion() const

src/plugins/qmldesigner/components/timelineeditor/timelineview.cpp

@@ -423,8 +423,6 @@ void TimelineView::customNotification(const AbstractView * /*view*/,
         QmlTimeline timeline = widget()->graphicsScene()->currentTimeline();
         if (timeline.isValid())
             timeline.modelNode().removeAuxiliaryData("currentFrame@NodeInstance");
-    } else if (identifier == "INSERT_KEYFRAME" && !nodeList.isEmpty() && !data.isEmpty()) {
-        insertKeyframe(nodeList.constFirst(), data.constFirst().toString().toUtf8());
     }
 }