Few new things for Custom Components:
Apparently you can now customize the name, icon and under which group your custom component will appear in the Toolbox (this was added a few days ago already, but didn’t test it yet).
What I did notice today was the option to make a Custom component avaliable as a container. Again, didn’t test it, but it appears you can now place components inside your custom components? Not sure how this would work or how to configure it, but it would be really cool!