fix #228: gjs: onScroll controller flags

Author: Aylur

lang/gjs/src/gtk3/astalify.ts

@@ -3,7 +3,7 @@ import Astal from "gi://Astal?version=3.0"
 import Gtk from "gi://Gtk?version=3.0"
 import Gdk from "gi://Gdk?version=3.0"
 import GObject from "gi://GObject"
-import Gio from 'gi://Gio?version=2.0';
+import Gio from "gi://Gio?version=2.0"
 import Binding, { type Connectable, type Subscribable } from "../binding.js"
 
 export { BindableProps, mergeBindings }

lang/gjs/src/gtk4/astalify.ts

@@ -213,6 +213,7 @@ function setupControllers<T>(widget: Gtk.Widget, {
 
     if (onScroll || onScrollDecelerate) {
         const scroll = new Gtk.EventControllerScroll
+        scroll.flags = Gtk.EventControllerScrollFlags.BOTH_AXES | Gtk.EventControllerScrollFlags.KINETIC
         widget.add_controller(scroll)
 
         if (onScroll)