mgr/dashboard: Manage CephFS quotas
It should be possible to manage CephFS quotas via the dashboard directly, e.g. setting new quotas, getting a list of all enabled quotas, editing and deleting existing ones.
One challenge might be that they are set using extended attributes via
setfattr on the actual file system, which would require the file system to be mounted on the Manager node. It would be better if this could be done via libcephfs.