Show current work item assignees for `/unassign`
What does this MR do and why?
Shows currently assigned users when /unassign @ is used within Work Items markdown fields. The implementation of this MR is similar to !183102 (merged) but we've further refined original implementation to and have cleaned up specs within spec/frontend/gfm_auto_complete_spec.js.
Screenshots or screen recordings
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How to set up and validate locally
- Go to any issue or an epic
- Assign a few users to it
- Use
/unassign @quick action within markdown field. - In this MR, it will show autocomplete dropdown with existing assignees.
- Without the changes from this MR, autocomplete dropdown doesn't show anything.
MR acceptance checklist
Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Related to #527159 (closed)