Set Security Dashboard as default view for groups
What does this MR do?
- This MR gives a user the option to display security dashboards for groups by default instead of the subgroup and projects view.
- It's a part of changes introduced for #7048
- Another part is the BE and UI for changing the setting "Group Overview default" in
User -> Settings -> Preferences: !9332 (merged)
What are the relevant issue numbers?
Corresponding MR in CE
Adds some supporting changes:
Does this MR meet the acceptance criteria?
- Changelog entry added, if necessary
[ ] Documentation created/updated- a separate MR is created for that: !9906
- Tests added for this feature/bug
- Conforms to the code review guidelines
- Conforms to the merge request performance guidelines
- Conforms to the style guides
- Conforms to the database guides
EE specific content should be in the top level
- For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?