Add ability to edit to global notification settings to the UI

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Problem to solve

Today global notification settings can only be changed via the API. This is not very discoverable and inconvenient to update.

Intended users

System Admin

Further details

Benefits: Easier to find, check notification settings, and update quickly and easily

Proposal

Add a new section to the Admin Area with the option to view/edit global notification settings.

Permissions and Security

Admin access

Links / references

/cc @victorwu

Edited by 🤖 GitLab Bot 🤖