The search field should have focus by default

[foscjos2]

Describe the bug
The search field no longer has a focus attribute

To Reproduce
Enter your secret engine and try to type to search for a secret. In a previous version of vault the search input field had a focus attribute that meant you could start typing without needing to click into the search field.

Expected behavior
The search field should have a focus attribute on it so that users can start typing to search for secrets without needing to select that input field.

Environment:
Using 1.18.1: https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#1181