Create the enable/disable menu item whether or not the user

already has an avatar.  Show/hide the enable/disable menu
item as needed.

exec/avatar_chooser.js

@@ -575,6 +575,7 @@ function MainMenu(parent_frame) {
                 }
                 frames.user_avatar.invalidate();
             }
+            if (state.ed_item instanceof TreeItem) state.ed_item.show();
 		}
 	}
 
@@ -693,12 +694,11 @@ function MainMenu(parent_frame) {
 				state.ae.open();
 			}
 		);
-        if (state.user_avatar !== null) {
         state.ed_item = state.tree.addItem(
-                tree_strings[state.user_avatar.disabled ? 'enable' : 'disable'],
+            tree_strings[state.user_avatar !== null && state.user_avatar.disabled ? 'enable' : 'disable'],
             enable_disable
         );
-        }
+        if (state.user_avatar == null) state.ed_item.hide();
 		state.tree.open();
 
 		state.timer.addEvent(2000, true, test_user_file);