Synced buckets have long names

[davidfraser]

I'm appreciating the syncing features of ActivityWatch.
I have a desktop on Google Cloud with a long hostname (62 characters) that would be a pain to change.
When I sync buckets from here to other ActivityWatch instances, they end up with a suffix of $hostname-synced-from-$hostname which is an extra 137 characters. This makes the bucket names column on the left take up a large amount of the screen:

On smaller screens, it makes the timeline view fairly unusable

Any of the following would help:

• Being able to override the hostname with a setting on the server
• Auto-collapsing $hostname-synced-from-$hostname to $hostname-synced

Also, it would be neat to be able to sort by host first instead of by bucket name