The unicode input is not scrolling

[LokiNaBoki]

Describe the bug
The unicode input is not scrolling

To Reproduce
Steps to reproduce the behavior:

1. Open kitty and run kitty +kitten unicode_input
2. Search for common phrase like "block"
3. Select the last visible symbol
4. Move downwards

Environment details

kitty 0.29.1 created by Kovid Goyal
Linux Asgard 6.4.4-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 19 Jul 2023 19:19:38 +0000 x86_64
Arch Linux 6.4.4-arch1-1 (/dev/tty)

DISTRIB_ID="Arch"
DISTRIB_RELEASE="rolling"
DISTRIB_DESCRIPTION="Arch Linux"
Running under: Wayland
Frozen: False
Paths:
  kitty: /usr/bin/kitty
  base dir: /usr/lib/kitty
  extensions dir: /usr/lib/kitty/kitty
  system shell: /bin/zsh

Config options different from defaults:

Important environment variables seen by the kitty process:
	PATH                                /usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl:/usr/lib/rustup/bin:/usr/lib/rustup/bin:/opt/scripts/:/home/adam/.local/bin/:/usr/lib/jvm/java-20-openjdk
	LANG                                en_US.UTF-8
	EDITOR                              /usr/bin/nvim
	SHELL                               /bin/zsh
	DISPLAY                             :0
	WAYLAND_DISPLAY                     wayland-1
	USER                                loki
	XCURSOR_SIZE                        24
	XDG_CONFIG_DIRS                     /etc/xdg
	XDG_BACKEND                         wayland
	LC_ADDRESS                          en_US.UTF-8
	LC_NAME                             en_US.UTF-8
	XDG_DATA_HOME                       /home/loki//.local/share
	XDG_CONFIG_HOME                     /home/loki//.config
	LC_MONETARY                         pl_PL.UTF-8
	XDG_SEAT                            seat0
	XDG_SESSION_DESKTOP                 Hyprland
	XDG_SESSION_TYPE                    wayland
	LC_PAPER                            pl_PL.UTF-8
	XDG_CURRENT_DESKTOP                 Hyprland
	XDG_CACHE_HOME                      /home/loki//.cache
	XDG_SESSION_CLASS                   user
	LC_IDENTIFICATION                   pl_PL.UTF-8
	LC_TELEPHONE                        pl_PL.UTF-8
	LC_MESSAGES                         en_US.UTF-8
	LC_MEASUREMENT                      pl_PL.UTF-8
	XDG_VTNR                            1
	XDG_SESSION_ID                      1
	LC_CTYPE                            en_US.UTF-8
	XDG_RUNTIME_DIR                     /run/user/1000
	LC_TIME                             pl_PL.UTF-8
	LC_COLLATE                          en_US.UTF-8
	XDG_DATA_DIRS                       /usr/local/share:/usr/share
	LC_NUMERIC                          pl_PL.UTF-8

Additional context
The scrolling was implemented in #4068 and is broken since the commit 1321a96.