The fleet UI is now working. You can select a fleet, select the amount of ships, then send them off to a desired location. When you send the fleet off, the remaining ships will be now selected, so you don't have to re-select the idling ships.
In the process of finishing the UI, I noticed that the "ETA" is now broken, and always display "ETA 0" That shouldn't be hard to fix. There's still one bug with the fleet UI that I hope to resolve shortly.
Sorry, my life has been very busy, so I'm unable to deliver a playable version this week. Maybe next week. But in the meantime, here's a screenshot to whet your appetite.