Use new user badge in user search results, also improve layout a bit

Description

The user/team search is a bit cramped, and it's hard for users to disambiguate users w/ similar names in the absence of the user badge, which they are used to seeing elsewhere.

Here's what a user list looks like here:

Here's what a user list looks like as a team widget and as mentioning individual users:

Environment

None

Assignee

Jay Hodgson

Reporter

Meredith Slota

Labels

Validator

Xavier Schildwachter

Development Area

None

Release Version History

None

Epic Link

Sprint

None

Fix versions

Priority

Major
Configure