Show commit title directly in system note created via mention of issuable in commit

Problem to solve

Display commit title not only on hower, but also inline.

Target audience

• Parker, Product Manager, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#parker-product-manager

• Delaney, Development Team Lead, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#delaney-development-team-lead

• Sasha, Software Developer, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#sasha-software-developer

Further details

Proposal

Show title on the second line.

Permissions and Security

no special ones

Documentation

What does success look like, and how can we measure that?

• see title directly in issue history without the need to hover the commit hash

Links / references