BrowseDashboards: Enable new Browse Dashboards UI by default

[joshhunt]

What is this feature?

Enables the new Browse Dashboards UI by default. See What’s new in Grafana Cloud for more details

Apart from the easier to use and more performant UI, this change removes the 'General' folder from the frontend, and instead lists dashboards at the root level of the view, after folders. This is because the General folder was never a "real" folder, and so there were lots of inconsistencies with it - it couldn't be renamed or deleted. Permissions could not be managed on it, and alerts could not be stored within the General folder.

Which issue(s) does this PR fix?:

Fixes #64210
Fixes #51825
Fixes #59543

[ashharrison90]

looks great! 🙌

[ashharrison90]

actually i lied, need to rerun the feature toggle tests to regen the documentation correctly 👍

[ashharrison90]

but then it looks great 😄

[ashharrison90]

cool 👍

[ChrisJBurns]

Just wanted to add for awareness, that this broke some of our permissions for viewing dashboards. We'd created some dashboards that were being applied into the General folder by default, and because it had grafana-editor permissions, non admins could see the dashboards. Now the dashboards are in root, only admins have permissions to see them.

We've created a folder now to resolve it, but just wanted to make folks aware incase you get issues raised from users who experienced the same.

[joshhunt]

@ChrisJBurns Are these dashboards provisioned? It sounds like you're running into #77082

Take note of the workaround:

A potential workaround until the fix is released would be for someone to log in as an Admin user and to manually set access to provisioned dashboards. This could either be done through the UI (using the dashboard and folder permissions tabs) or through API calls.

If you disable the new UI do the dashboards show up? You can disable the newBrowseDashboards feature toggle to narrow down the cause.

Just for context - The General folder has never actually existed. It's always been a weird fiction of the frontend, as a place to put dashboards that aren't in a folder (which is why things like Alerts could never be put in General, because "General" means "no folder" and Alerts require a folder), which is why we 'removed' it. It should be unlikely that this UI change impacts permissions on items, but stranger things have happened :)