"Search query syntax documentation" and "Open query history" icons should remain vertically aligned with top of search input

## Expected Behavior

The `Search query syntax documentation` and `Open query history` icons should remain vertically aligned with the top of the search input when multiline (or very large) queries are provided.

## Current Behavior

When a multiline (or very large) search query is used the `Search query syntax documentation` and `Open query history` icon positions appear to shift.

## Steps to Reproduce (for bugs)

1. Be on Graylog `7.1.8` (but presumably any other version)
2. Go to `/search` and enter a multiline (e.g. 4+) query.
3. Note the `Search query syntax documentation` and `Open query history` icons' vertical positions shift.

## Context

No real issue-- it just doesn't look great :)

## Your Environment

* Graylog Version: `7.1.8`
* Browser version: Chrome `152`, Firefox `154`

## Checklist
[] This issue fix need to be backported.
[] Does this issue have **security** implications?

Start at the `/search` page and reproduce the issue with a multiline query in Chrome or Firefox. Inspect the search input and the `Search query syntax documentation` and `Open query history` icons; done means both icons remain vertically aligned with the top of the input as the query grows.

Written by the indexing model from the issue text.