Missing indicator icon

This is probably using relative path instead name, it can be checked with `gdbus` and `dbus-monitor`

```
readonly s Id = 'tray-icon tray app';
readonly s Category = 'ApplicationStatus';
readonly s Status = 'Active';
readonly s IconName = '/run/user/60466/tray-icon/tray-icon-2-0.png';
readonly s IconAccessibleDesc = 'icon';
readonly s AttentionIconName = '';
readonly s AttentionAccessibleDesc = '';
readonly s Title = 'sh.loft.devpod';
readonly s IconThemePath = '/run/user/60466/tray-icon';
readonly o Menu = '/org/ayatana/NotificationItem/tray_icon_tray_app/Menu';
readonly s XAyatanaLabel = '';
readonly s XAyatanaLabelGuide = '';
readonly u XAyatanaOrderingIndex = 0;
```

Its same as here https://github.com/flathub/io.ente.auth/issues/74