Prefer showing more disks than more mount points

[msrd0]

Checklist

• [X] I've looked through the documentation and existing open issues for similar feature requests.

Describe the feature request

Currently, bottom sorts the entries in the disks table by the disk, hiding entire disks when there isn't enough space. As a user of btrfs and a few subvolumes, the list of my "root" partition is quite long, and /dev/dm-0 happens to always be on top of the list. However, most of the time I am interested in either the usage or free space of a particular drive, which doesn't differ between different mount points of the same drive, or the speed that my external usb ssd is running at, which is always the last in the list. Showing the same drive with 5 different mount points and then cutting of the list due to insufficient screen space isn't very helpful in this case. Therefore I'd like an option to display disks only once and "ignore" different mount points for the same disk.

[ClementTsang]

Hm, at least for now there's an option in the config file to filter out entries by mount name.

[ClementTsang]

But yeah I can take a look.

[msrd0]

Hm that filter works but is very system specific and prone to errors. E.g. if I remove those mount points under my user home of my internal hdd but leave only the one that my user has no rights to access (which makes the regex a lot easier) then everything is listed as N/A, which is not very helpful.

[ClementTsang]

That's fair, meant that more as just a temporary solution while I look at a solution.