Remove "Root Node"

[iyzpx]

Describe the solution you'd like To enhance usability, the "root node" should either be folded out by default or not displayed at all as in the old version of part-db. It would be also useful when the default datasources can be changed for everyone.

Additional context part-db 0.6: https://i.pewx.de/yzw/ZoyOWOxI09.png/raw part-db 1.0: https://i.pewx.de/yzw/CUkUqIhI93.png/raw

I think there is no need for that "Root node"