Lookup UX disallows opening items in a new tab/window

Previously in Graylog, one could quite easily open multiple items from the entitle table by opening links in a new tab/window. Graylog 7.1 broke this. This has also been carried over into Graylog 7.2

## Expected Behavior

`a` elements behave as proper HTML `a` elements and allow opening the link in a new tab/window.

## Current Behavior

Forced to click and open in the same existing window making doing bulk work difficult.

## Possible Solution

Revert the change that broke this.

## Steps to Reproduce (for bugs)

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## Context

## Your Environment

* Graylog Version: 7.1, 7.2

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

Start by reproducing the issue in the Graylog lookup table on versions 7.1 or 7.2 and compare its behavior with the earlier version. Trace the lookup-table item links to identify the regression; done means standard link actions can open items in a new tab or window while normal navigation still works.

Written by the indexing model from the issue text.