React ltseditor

We discussed merging this branch into React before we continue our 4-Milestone journey.

This MR is not perfect, but I assume it's decent given the current state of the project. I am aware of the following issues:

• Interacting with the LTSInteractiveView in any way (eg. hovering a node of the LTS) resets the cooldown animation
• (Not reproducible anymore, possibly fixed) When updating the source code while displaying a minimized LTS, minimization of the new LTS (from new source code) is impossible due to illegal UI state

I very well might have forgotten to mention something here. If there are any other minor or major issues, I'll gladly address them.