add explanation for the weird behaviour I have seen

git-svn-id: https://xpra.org/svn/Xpra/trunk@8307 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/x11/server.py

@@ -108,6 +108,9 @@ def configure_window(self, win, x, y, w, h, resize_counter=0):
                 model.geom = new_geom
         if not self.visible(win):
             model.shown = True
+            #Note: this will fire a metadata change event, which will fire a message to the client(s),
+            #which is wasteful when we only have one client and it is the one that configured the window,
+            #but when we have multiple clients, this keeps things in sync
             win.set_property("iconic", False)
             if win.ownership_election():
                 #window has been configured already