Apply horizon patches (#1360)

diff --git a/images/horizon/Dockerfile b/images/horizon/Dockerfile
index 44ba2fa..97746dc 100644
--- a/images/horizon/Dockerfile
+++ b/images/horizon/Dockerfile
@@ -23,6 +23,8 @@
 RUN git -C /src/octavia-dashboard fetch --unshallow
 ADD --keep-git-dir=true https://opendev.org/openstack/senlin-dashboard.git#stable/2023.1 /src/senlin-dashboard
 RUN git -C /src/senlin-dashboard fetch --unshallow
+COPY patches/horizon /patches/horizon
+RUN git -C /src/horizon apply --verbose /patches/horizon/*
 COPY patches/magnum-ui /patches/magnum-ui
 RUN git -C /src/magnum-ui apply --verbose /patches/magnum-ui/*
 RUN --mount=type=cache,mode=0755,target=/root/.cache/pip,sharing=private <<EOF bash -xe