Pressing Enter does not select highlighted Issue Label

[bartvdbraak]

Description

After upgrading Gitea 1.22.6 to 1.23.1, our triagers have encountered that labels can no longer be set by typing in the name and then pressing enter.

Steps to reproduce:

1. Go to a issue or pull request
2. On the right select the Labels text and you will have a option to change the labels.
3. Type in a label you want (E.g. High for Serverity | High)
4. Notice that the High severity label is highlighted, and press Enter to select it.
5. Notice that the label doesn't get selected.

Gitea Version

1.23.1 built with GNU Make 4.4.1, go1.23.5 : bindata, timetzdata, sqlite, sqlite_unlock_notify

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

In the image above, pressing Enter won't select the highlighted issue label.

Git Version

2.47.2

Operating System

Ubuntu 24.04

How are you running Gitea?

Docker Compose with source of truth at https://github.com/blender/gitea

Database

PostgreSQL

[wxiaoguang]

Maybe related to "make search box in issue sidebar dropdown list always show when scrolling #32576", it makes the dropdown lose keyboard support

[wxiaoguang]

Could you try Fix issue dropdown sidebar keyboard support #33447 ?