Query history arrow key shortcuts for main search input

## What?

When the main search query input is in focus and there isn't a multiline search query present the `up` and `down` arrow keys should rotate through the query history (similar to a terminal's command history).

Alternatively: with the same conditions, the `down` arrow triggers display of the query history (equivalent to clicking the `Open query history` icon or using the less-intuitive `ctrl`+`space` shortcut).

## Why?

Ease of use of the query history.

## Your Environment

* Graylog Version: `7.1.3`

Start at the main search query input and its Open query history control, then trace the existing query-history behavior and the ctrl+space shortcut. Done means the up and down arrows rotate through history for single-line queries, or the down arrow opens history as specified, without changing multiline query editing.

Written by the indexing model from the issue text.