Add title handling to StateBuilder

This Pull Request has been created because I found myself manually re-implementing every state column row adding title's to them.

This Pull Request changes StateBuilder to support title: ... option.

activeadmin_addons_state_title

Before submitting the PR make sure the following are checked:

[x] This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
[x] Commit message has a concise description of what changed and why.
[x] Tests are added or updated if you fix a bug or add a feature.
[x] Documentation has been added or updated if you add a feature or modify an existing one.
[x] CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature (under the "Unreleased" heading if this is not a version change).
[x] My changes don't introduce any linter rule violations.

platanus / activeadmin_addons