Alert timeline box on alert details page needs pagination.

## Expected Behavior

* Alert details page loads fast
* Alert details page gives quick overview of alert details

## Current Behavior

* Due to a high amount of alert details for a longer alert, loading of the page tooks long
* The alert timeline box is unrestricted in size and takes over most of the page, requiring lots of scrolling to get to useful information

## Possible Solution

Implement pagination for the alert timeline box and fetch only the first n entries

## Steps to Reproduce (for bugs)
1. Create alert condition that triggers alert
2. Create alert notification that fails continuously
3. Return to the alert details page after an hour