chore: add custom ScrolledWindow class

dzgui/views/components/scrollable.py

@@ -0,0 +1,11 @@
+from dzgui.util import css
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk  # noqa
+
+
+class NoOverlayScrolledWindow(Gtk.ScrolledWindow):
+    def __init__(self) -> None:
+        super().__init__(overlay_scrolling=False)