Implement duplicator viewport/render visibility options

This allows a duplicator (as known as dupli parent) to be in a visible
collection so its duplicated objects are visible, however while being
invisible for the final render.

An object that is a particle emitter is also considered a duplicator.

Many thanks for the reviewers for the extense feedback.

Reviewers: sergey, campbellbarton

Differential Revision: https://developer.blender.org/D2966

release/scripts/startup/bl_ui/properties_object.py

@@ -278,6 +278,13 @@ class OBJECT_PT_display(ObjectButtonsPanel, Panel):
             col.label(text="Object Color:")
             col.prop(obj, "color", text="")
 
+        col = layout.column()
+        col.active = bool(is_dupli or obj.particle_systems)
+        col.label(text="Duplicator Visibility:")
+        row = col.row(align=True)
+        row.prop(obj, "show_duplicator_for_viewport", text="Viewport")
+        row.prop(obj, "show_duplicator_for_render", text="Render")
+
 
 class OBJECT_PT_duplication(ObjectButtonsPanel, Panel):
     bl_label = "Duplication"