Theme and display mic icon only if suggestion is available (S)

Description

Reduce mic icon size and apply theme

Screenshots

Technical details

Tests

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/3312#note_678851 https://gitlab.e.foundation/e/os/backlog/-/issues/3066 https://gitlab.e.foundation/e/os/backlog/-/issues/3323

10 commandments of code reviews

👪 ❤️ https://gitlab.e.foundation/internal/wiki/-/wikis/mobile-team/guidelines/Code-review