Added back "Marker" menu to all animation editors.

Issues:
- It looks a bit crowded though, so perhaps we could do without, and
just leave it for the TimeLine only?
- Due to the way the invoke() testing works, the rename operator
called from the menu currently fails. Will need to experiment more
with execution options to find a workaround.

release/scripts/ui/space_graph.py

@@ -39,6 +39,7 @@ class GRAPH_HT_header(bpy.types.Header):
 
             sub.menu("GRAPH_MT_view")
             sub.menu("GRAPH_MT_select")
+            sub.menu("GRAPH_MT_marker")
             sub.menu("GRAPH_MT_channel")
             sub.menu("GRAPH_MT_key")
 
@@ -132,6 +133,25 @@ class GRAPH_MT_select(bpy.types.Menu):
         layout.separator()
         layout.operator("graph.select_linked")
 
+class GRAPH_MT_marker(bpy.types.Menu):
+    bl_label = "Marker"
+    
+    def draw(self, context):
+        layout = self.layout
+        
+        #layout.operator_context = 'EXEC_REGION_WIN'
+        
+        layout.column()
+        layout.operator("marker.add", "Add Marker")
+        layout.operator("marker.duplicate", text="Duplicate Marker")
+        layout.operator("marker.delete", text="Delete Marker")
+
+        layout.separator()
+        
+        layout.operator("marker.rename", text="Rename Marker")
+        layout.operator("marker.move", text="Grab/Move Marker")
+        
+        # TODO: pose markers for action edit mode only?
 
 class GRAPH_MT_channel(bpy.types.Menu):
     bl_label = "Channel"