[Request]: Update Libadwaita to 1.4 (GNOME 45)

[LSeelig]

Tell us the problem or your need

The sidebar and header designs are now slightly outdated as GNOME 45 released with a new version of Libadwaita

Describe the solution you'd like

A minor update to the app's UI to better reflect/fit into the current GNOME version

Describe alternatives you've considered

No response

Additional context

No response