Ignores mail directories starting with dot

[haarp]

OS: Gentoo Linux AMD64

Linux Desktop Manager: Xfce

Birdtray version: 1.9.0
Thunderbird version: 102.4.0
Birdtray origin: Compiled by source package
Qt version: 5.15.2

Description
I somehow managed to get Thunderbird 102 to create a POP3 Mail directory starting with a dot. I'm not sure if this is a recent development in 102. Under Unix/Linux, files starting with a dot are traditionally considered "hidden".

Birdtray will not see such directories. They are not available for selection in Monitoring.

Expected behavior
All directories available.

To Reproduce

1. Create a dot-directory, e.g. copy an existing one to ~/.thunderbird/Mail/.foo
2. Restart Birdtray, try to find the dir under Monitoring

Additional context
Workaround: Create a symlink in the Mail directory, e.g. foo -> .foo

Thanks!

[haarp]

Confirmed fixed with that commit. Thanks @Abestanis and @gyunaev !