Keep original window size when restoring from system tray

src/core/mainwindow.cpp

@@ -1337,7 +1337,7 @@ void MainWindow::SetHiddenInTray(bool hidden) {
 
   // Some window managers don't remember maximized state between calls to hide() and show(), so we have to remember it ourself.
   if (hidden) {
-    //was_maximized_ = isMaximized();
+    was_maximized_ = isMaximized();
     hide();
   }
   else {