Notification replies

[CLOVIS-AI]

Android notifications can let the user type an answer to a comment directly from the notifications shade, without opening the app.

This is very convenient because it is synchronized with other platforms, making it possible to reply to comments without interacting with the phone at all (e.g. on a smartwatch, on a desktop using KDEConnect…).

[LaurentTreguier]

This will probably be handled later as part of a larger reply system, when comments can track which other comment they may be replying to. With this tracking in place, responding from a notification will unambiguously respond to a specific comment (instead of simply adding a new comment without a clear relation with any of the previous ones)