New "Manage Jenkins" page is not well supported by the implied labels plugin

### What feature do you want to see added?

The configuration user interface of the implied labels plugin needs to be reworked to better fit with the new "Manage Jenkins" experience.

### Upstream changes

Needs investigation to understand the preferred way to present this type of configuration UI.

### Are you interested in contributing this feature?

Yes, though others are welcome to do so as well.

Start by inspecting the implied labels plugin's configuration user interface and researching how Jenkins presents plugin configuration in the newer "Manage Jenkins" experience. Identify the preferred upstream pattern before planning the rework. Done means the configuration UI fits the new experience and its behavior remains supported by the plugin.

Written by the indexing model from the issue text.