Resolve "GitLab Migration - History page inconsistencies"

What does this MR do and why?

This MR improves history page according to #383759 (closed)

• changed column names
• fixes wrong handling of projects with space names
• added icons

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Enable feature flag :bulk_import_projects in rails console: Feature.enable(:bulk_import_projects)
• In GitLab admin settings turn on Enable migrating GitLab groups and projects by direct transfer and save changes /admin/application_settings/general#js-visibility-settings
• Open "New group" -> Import (/groups/new)
• Use https://gitlab.com as source instance and GeK1Nis4j-SY1X4sqE5c as personal access token (this token is from separate user on GitLab instance with 0 real data available, so we do not expose any security risks here)
• Import top-level-group-1 (it contains project)
• Open History page /bulk_imports/history
• Observe the result

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.