The bottom-bar UI elements have just gotten a bit of an overhaul -- as of r12176 (stable) planets now use on-hover icons, bringing them into rough alignment with the new fleet UI.
Also, it should now finally be possible to *see* the planetary defense loadouts equipped by your own planets.
Transports now have a number of special on-hover behaviors, which should provide easier-to-use shortcuts relative to the older tradepool / embark / disembark buttons.
The old shift left click colonist transport semantics still work -- but, they should be mostly unnecessary, given the new buttons. Let me know what you think of the changes.