Signal-android: Allow notification messages in muted groups

[siccovansas]

I have:

• [x] searched open and closed issues for duplicates
• [x] read https://github.com/WhisperSystems/Signal-Android/wiki/Submitting-useful-bug-reports

---

Feature description

It is currently not possible to still receive notification messages for a group when you have enabled the Mute notifications option in a group chat. In other words, both the notification sound and the notification messages are muted. WhatsApp gives you the option to still receive notifications for a group chat after you muted it, thus effectively only muting the notification sound. I received a complaint from a user who just converted from WhatsApp to Signal who would like this feature to also be present in Signal.

Steps to reproduce

• open a group chat
• click on the options menu > Mute notifications

Wanted result: - ideally there would be a check box allowing you to choose if you still want to receive notification messages

Screenshots

This shows how WhatsApp implemented this feature

Device info

Device: Nexus 5
Android version: 6.0.1
Signal version: 3.20.4

[cascheberg]

Similar discussion in #3957, would be fixed by #4957.

[2-4601]

Fixed by #4957