Line height for single line messages is too tall
Issue
While messages with line breaks show a small gap in between, individual sent or received message are rendered with a huge gap:
Setup
- Gajim 1.5.3+266c1290
- Theme: Adwaita
- openSUSE TW KDE Plasma 5.26.2 Wayland
- GTK Version: 3.24.34
- GLib Version: 2.74.0
- Pango Version: 1.50.11
- PyGObject Version: 3.42.2
- cairo Version: 1.17.6
- pycairo Version: 1.21.0
- python-nbxmpp Version: 3.2.5