update message reactions when those are changed

[foss-]

macOS 15.7.4
Fluux 0.13.2 (1c7c0af)

Reproduce

1. open Fluux muc in Gajim and Fluux
2. react to a message with any emoji reaction in Gajim
3. message reaction should show in Fluux muc in Fluux software
4. in Gajim remove initial message reaction and use another emoji reaction

Currently

Fluux software still shows initial message reaction.

Expected

Latest message reaction should be shown and retracted message reaction should no longer be shown.

[mremond]

Thanks, it will be fixed in 0.14.0.