It's a pretty cool app. However, I would advise the developers to put text descriptions under all the icons, because it is not clear what the the icons do, and it is a pain to have to hover over them to find out.
As the set of components will grow, it may become easier to just enter a few letters in the search box to filter down the options. I am also thinking about putting in the front somehow the most used components.
Good luck with the project. It looks like a really cool bit of software.