Adapt background sound volume based on video volume

[Betree]

We should retrieve the volume from ReactPlayer and adapt background notifications volume accordingly. As of today the volume can be too strong or too low.

• Store the volume from ReactPlayer in redux state
• Retrieve the value in app/components/App/BackgroundNotifier.jsx
• Set audiofile.volume = ___ for all notifications types (refute/confirm/neutral)

[Betree]

💸 A 30€ bounty was attached to this issue. Anyone submitting a Pull Request will be rewarded with 30€ when the Pull Request is reviewed, accepted and merged. More info.

[Miragide]

@Betree maybe should you give more explanation of this issue?

[Betree]

If your computer volume is 100% and you put the video's volume at 10%, the notifications will keep popping loud. The idea is to synchronize the volume of notifications with what you put in the player.

[bluewojack]

I'm working on this and will open a PR against captain-fact-frontend.

[bluewojack]

PR opened: CaptainFact/captain-fact-frontend#1423