Interface hangs when "download completed" sound is played

[heylix]

System Details:

• Operating System: Linux
• Distro(For GNU/Linux and BSD users): Fedora 32
• Desktop Environment(For GNU/Linux and BSD users): Xfce 4.14
• Persepolis Version: 3.2.0
• aria2 version: 1.35.0
• python version: 3.8.3
• How do you install Persepolis? Repositories

persepolis_log.txt

→ noticed there's a newline after every log entry, is that intentional?

Issue Description and steps to reproduce:

• Add download
• Start download
• try to do something in the UI when the "Ding" sound is playing
  • e.g. scrolling hangs, buttons take until the sound is finished to execute

Wild guess: maybe that's because the sound is played in the same thread as the UI updates?

[itisrasoul]

@heylix It seems that you know something about qt, so you can go and check it yourself and do a pull request if you wish!