One thing to remember is (regardless of export) projects are HTML5 based. With the HTML Element object you can create any UI with some very simple HTML (for example a list or table with images ETC). This is far better than any built in object to do the same job.
I am a web developer so its easy for me to say. But with the (lets be real) unbelievable amount of free HTML resources online I highly recommend learning some HTML/CSS (if you don't already) and playing with the HTML element for such UI controls.
The question is how you communicate between what you added to the list and the game. For example if I make a list of pictures and want to drag one outside the game. It will probably be more complicated. And the whole idea of this engine is that it will be simple to use.
I am a Unity and Unreal game developer and Construct It's just my hobby, And I discover many simple things that are a shame that are not added to the game.
Things that the Construct 3 developers will take a few days to implement in the game And everything will be better and to the users will be much easier.