I changed all the dropdowns (except for size option) to button, so it brings up a "mini-screen" listing technologies in that area. The reasoning behind this is that it displays information before you have to select something. The dropdown only displays the name, but not space usage, or any other specifications, so it's not very useful.
I also finished implementing most of the remaining UI elements. The only thing left are scrollbars when having so many items that you can't see them all on one screen, to allow you to scroll through. Then the UI functionality are complete. The buttons you see on the screenshot below are all working. Note the first laser cannon having more damage than the same weapon below, this is due to increased mounts.
The other things left to do is displaying information, like space usage, specifications for the left fields, and the ship cost, then the ship design screen is complete. I would continue work on this, but I'm really tired. So I thought you'd like to see the progress on this :)