Remove the "Delete selected" from dashboard-only users

[xeraa]

Describe the feature:

If you are logged in as a dashboard-only user and you select one or more dashboards in the overview, then the button "Delete selected" appears. It will fail when being clicked (I assume because of the lack of write permissions to the .kibana index). But a user was very concerned about it today and thought he had found a major bug. I agree that it is a bit confusing and we should be hiding the button if the user lacks the permissions.

Describe a specific use case for the feature:

Less confusion of users.

[elasticmachine]

Pinging @elastic/kibana-security

[elasticmachine]

Pinging @elastic/kibana-app

[kobelb]

I agree that we should be hiding the delete button when the user isn't able to delete the dashboard. When we added Feature Controls we hooked into the existing "hideWriteControls" built into Dashboards, which will need to be revised to also hide the delete button.

[jondlm]

Hi. I'm a new contributor that was attracted by the "good first issue" label. Anyway, I looked into this issue and found that the dashboard-only mode was removed in 7.4 (ref #50441) in favor or the RBAC approach (AFAICT). I also found that the issue doesn't seem to manifest anymore with read only role permissions. When a user only has read permissions for dashboards they don't have the ability to select items and delete them. I did my testing on the latest on master (88ba41f).

Seems to me this issue should either be closed or a fix should be back ported into a previous version. I'll leave that up to you folks to decide.

[sulemanof]

Kibana user, which was granted access to Dashboard with read only privilege, isn't allowed to select or delete any item from the list of saved dahboards:

Tested on master / 7.8 release branch, works as expected.