Cleaning up our navigational order - Groups

What does this MR do?

Covers Group nav changes from #26348 (closed)

Why was this MR needed?

See meta issue #25386 (closed) and the related issue #26348 (closed)

Screenshots

Group tab - GitLab CE

Group tab - GitLab EE

Issues tab - GitLab CE/EE

Merge Requests tab - GitLab CE/EE

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

See #26348 (closed)

added 101 commits

• c0f344a5...b08be165 - 96 commits from branch master
• b92643ef - Group tab sub-nav
• f888e33a - Issues tab sub-nav
• 08eaf849 - Add sub-nav to page
• 1cc954f3 - Add Issues tab sub-nav to page
• 9227afbb - Move links to sub-navs for Group and Issues tab

Compare with previous version

added 1 commit

• a72399be - Fix Milestones accessor to use helper instead of selector

Compare with previous version

added 197 commits

• a72399be...12cd4c83 - 190 commits from branch master
• 46f15be2 - Group tab sub-nav
• c6cb543a - Issues tab sub-nav
• 2456e403 - Add sub-nav to page
• 3fe3f91d - Add Issues tab sub-nav to page
• 420bb4eb - Move links to sub-navs for Group and Issues tab
• f9102f17 - Fix Milestones accessor to use helper instead of selector
• 9687e4dd - Add changelog entry

Compare with previous version

marked the task Changelog entry added as completed

marked the task Added for this feature/bug as completed

marked the task All builds are passing as completed

marked the task Conform by the merge request performance guides as completed

marked the task Conform by the style guides as completed

marked the task Branch has no merge conflicts with master (if it does - rebase it please) as completed

unmarked as a Work In Progress

Hi @dimitrieh, Group nav changes have been completed, please check it locally before we assign this to endboss for review and merging

@kushalpandya looks really good

a note: this MR btw closes #26348 (closed) , while it does not cover the whole issue ;)

@dimitrieh ah, got to update issue description

assigned to @alfredo1

marked the task Squashed related commits together as completed

Hi @alfredo1, this MR attempts to cover Group nav changes from issue #26348 (closed). Could you review it?