save and restore roster position when we click on systray icon. Fixes #5196

src/statusicon.py

@@ -377,9 +377,15 @@ class StatusIcon:
                 # we could be in another VD right now. eg vd2
                 # and we want to show it in vd2
                 if not gtkgui_helpers.possibly_move_window_in_current_desktop(win):
+                    x, y = win.get_position()
+                    gajim.config.set('roster_x-position', x)
+                    gajim.config.set('roster_y-position', y)
                     win.hide() # else we hide it from VD that was visible in
             else:
-                win.show_all()
+                if not win.get_property('visible'):
+                    win.show_all()
+                    win.move(gajim.config.get('roster_x-position'),
+                        gajim.config.get('roster_y-position'))
                 if not gajim.config.get('roster_window_skip_taskbar'):
                     win.set_property('skip-taskbar-hint', False)
                 win.present_with_time(gtk.get_current_event_time())