Wildcard V2: <Popover /> style migration

Created by: gitstart-sourcegraph

Description

Manual Migrations to wildcard component, in highlighted files and components with usage of dropdown-menu

Refs

Gitstart Ticket SourceGraph Link Review Changes Loom video Parent Issue

Test Plan

• Run web app using preview app.
• Confirm there are no UI variations while comparing all use cases of Popover with prod environment

Preview App

Frontend Storybook

Implementation

Styles migration:

1. Migrate usage of dropdown-menu class to Wildcard Popover
2. Remove dropdown-menu Bootstrap dependency - reimplement styles in Popover CSS module

Note: dropdown-menu usage is also required for the Menu components. We should wait until this migration (https://github.com/sourcegraph/sourcegraph/issues/27701) is finished before migrating away from global styles.

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.