Added New Window option to Tray

[Devenor]

Pull Request Type

• Bugfix
• Feature Implementation
• Documentation
• Other

Related issue

Adds #7049 functionality to the Tray

Description

Tray menu option enabling to open a new Freetube instance.

Screenshots

Testing

When clicking the New Window option, a new window opens. Other windows hidden in the tray must remain there.

Desktop

• OS: Windows, Linux
• OS Version: Windows 10, Ubuntu 22.04.3 LTS
• FreeTube version: 0.23.8 Beta

Additional context

[Devenor]

Done, but I was thinking that when the main window is hidden to the tray and there are other visible windows, none of them become the main window. Should I change that too?

[absidue]

If it is easy to do, sure, if not then it would be better to leave it for a separate pull request.

[Devenor]

I've added the following:

• When all windows are hidden, the first one to be shown becomes the new main window.
• If the main window is hidden, the one that has the focus becomes the new main window.
• If no window has the focus (for example if they are behind another app), the last opened window becomes the new main window.

Seems to work fine. My only concern is about the timer in Linux, it works in my distro, but we might need to increase it a bit if it's not enough in others.