GPencil: Include various new operators into the 3D View menus too

Quite a few of the operators added for 2.78 were not included in the menus

release/scripts/startup/bl_ui/space_view3d.py

@@ -3053,11 +3053,18 @@ class VIEW3D_MT_edit_gpencil(Menu):
         layout.separator()
 
         layout.menu("VIEW3D_MT_object_animation")   # NOTE: provides keyingset access...
+        layout.menu("VIEW3D_MT_edit_gpencil_interpolate")
 
         layout.separator()
 
         layout.menu("VIEW3D_MT_edit_gpencil_delete")
         layout.operator("gpencil.duplicate_move", text="Duplicate")
+        layout.operator("gpencil.stroke_subdivide", text="Subdivide")
+
+        layout.separator()
+
+        layout.operator_menu_enum("gpencil.stroke_join", "type", text="Join...")
+        layout.operator("gpencil.stroke_flip", text="Flip Direction")
 
         layout.separator()
 
@@ -3077,6 +3084,11 @@ class VIEW3D_MT_edit_gpencil(Menu):
         layout.separator()
 
         layout.operator_menu_enum("gpencil.move_to_layer", "layer", text="Move to Layer")
+        layout.operator("gpencil.stroke_change_color", text="Move to Color")
+        layout.operator_menu_enum("gpencil.stroke_arrange", "direction", text="Arrange Strokes...")
+
+        layout.separator()
+
         layout.operator_menu_enum("gpencil.convert", "type", text="Convert to Geometry...")
 
 
@@ -3097,6 +3109,20 @@ class VIEW3D_MT_edit_gpencil_transform(Menu):
         layout.operator("transform.tosphere", text="To Sphere")
         layout.operator("transform.transform", text="Shrink Fatten").mode = 'GPENCIL_SHRINKFATTEN'
 
+        layout.separator()
+
+        layout.operator("gpencil.reproject")
+
+
+class VIEW3D_MT_edit_gpencil_interpolate(Menu):
+    bl_label = "Interpolate"
+
+    def draw(self, context):
+        layout = self.layout
+
+        layout.operator("gpencil.interpolate", text="Interpolate")
+        layout.operator("gpencil.interpolate_sequence", text="Sequence")
+
 
 # ********** Panel **********