This one is deprecated, but should work much better than any other system tray icon backend we currently have, both in term of supported features and reliability. It justs needs some testing to see where we can enable it now.
It was really just spam, let's wait thrice as long to stay reasonnable. I remember a long time ago some people couldn't connect because we were spamming too much bootstrap nodes
Added null checks around usage of tray icon object.
This change solves issues/crashes where tray is not immediately available when qTox is started. It is common on linux desktops. While for example lxqt has option to delay application autostart until panel (and thus tray) is available other desktops (like KDE) do not. Adding checks around use of icon object was not enough because application may start a little bit earlier than panel is available. For that reason tray icon creation is delayed to timer event and tried multiple times with delay of one second. Usually after few tries icon creation succeeds and signal is disconnected.
In case tray is not available qTox window is shown. This creates a side effect where starting qTox before tray is available will make application window briefly appear and when tray is available window will be hidden or remain visible as per settings. Window has to be visible if tray is unavailable because otherwise users may end up with qTox running and no way to access it. If application is started and tray is available no window flashing happens and settings are restored as usual.
Without this patch if qTox started before tray is available window is shown and changing tray icon visibility option crashes application. Thats probably a known issue.
