Show previews of alert config on hover

### Problem Statement

I have a bunch of alerts setup and need to manually click into each one when trying to view its configuration.

### Solution Brainstorm

Would be nice if we offered a preview of the alert config on hover so that you do not need to leave the main view.

### Product Area

Alerts

Start with the Alerts product area and the main alerts view described in the issue. Inspect how alert configurations are currently opened and whether the view has existing hover previews; done means users can inspect each alert's configuration without leaving the main view.

Written by the indexing model from the issue text.