Enhancement on the UI functions per source code line

Description

At this moment, on Gitlab web UI for source code line, the only function provides the permalink which need to be expanded for more functions.

Proposal

Enhanced menu for source code line similar to below.

Links / references

Current UI.

Documentation blurb

Overview

This is a popup menu when user clicks the number then the triple-dot. The menu could contain items for the operations against the current source code line, e.g. open a new issue for it with the permalink of it pre-filled in issue description.

Use cases

This is for better developer productivity. User could perform actions for the operations for the current line without switching to other views.

Feature checklist

Make sure these are completed before closing the issue, with a link to the relevant commit.

• Feature assurance
• Documentation
• Added to features.yml