[polari] app: Inherit from Adw.Application

[Marge Bot <marge-bot src gnome org>]

commit ff9aa39f997b4947524f22dabd3ddac7113e58bb
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Dec 31 14:19:21 2021 +0100

    app: Inherit from Adw.Application
    
    This takes care of initializing libadwaita, loading its stylesheet
    and support the system's dark-style preference.
    
    Part-of: <https://gitlab.gnome.org/GNOME/polari/-/merge_requests/250>

 src/application.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/application.js b/src/application.js
index 86c2a99f..867cd77d 100644
--- a/src/application.js
+++ b/src/application.js
@@ -1,3 +1,4 @@
+import Adw from 'gi://Adw';
 import Gdk from 'gi://Gdk?version=4.0';
 import Gio from 'gi://Gio';
 import GLib from 'gi://GLib';
@@ -38,7 +39,7 @@ const MAX_RETRIES = 3;
 const IRC_SCHEMA_REGEX = /^(irc?:\/\/)([\da-z.-]+):?(\d+)?\/(?:%23)?([\w.+-]+)/i;
 
 export default GObject.registerClass(
-class Application extends Gtk.Application {
+class Application extends Adw.Application {
     static [GObject.signals] = {
         'prepare-shutdown': {},
         'room-focus-changed': {},