Closes https://github.com/zed-industries/zed/issues/51576

Release Notes:

- Select first entry in the language selector when matching a query



https://github.com/user-attachments/assets/c824c024-d2f1-416e-a347-0eab7bc3ae0a

Signed-off-by: Xiaobo Liu <cppcoffee@gmail.com>