app: Clarify corner case uses of gimp_object_name_changed()

app/core/gimpdata.c

@@ -355,6 +355,7 @@ gimp_data_real_dirty (GimpData *data)
 
   gimp_viewable_invalidate_preview (GIMP_VIEWABLE (data));
 
+  /* Emit the "name-changed" to signal general dirtiness */
   gimp_object_name_changed (GIMP_OBJECT (data));
 }
 

app/core/gimpfloatingselundo.c

@@ -122,6 +122,10 @@ gimp_floating_sel_undo_pop (GimpUndo            *undo,
           gimp_layer_set_floating_sel_drawable (floating_layer, NULL);
         }
 
+      /* When the floating selection is converted to/from a normal
+       * layer it does something resembling a name, so emit the
+       * "name-changed" signal
+       */
       gimp_object_name_changed (GIMP_OBJECT (floating_layer));
 
       gimp_drawable_update (GIMP_DRAWABLE (floating_layer),

app/core/gimplayer-floating-sel.c

@@ -149,6 +149,10 @@ floating_sel_to_layer (GimpLayer  *layer,
 
   gimp_image_undo_group_end (image);
 
+  /* When the floating selection is converted to/from a normal layer
+   * it does something resembling a name, so emit the "name-changed"
+   * signal
+   */
   gimp_object_name_changed (GIMP_OBJECT (layer));
 
   gimp_drawable_update (GIMP_DRAWABLE (layer),