This reverts commit 1e1bd405.

Renamed the overlays directory to components.
Typescript now compiles to es6 instead of es5 (es6 content gets translated by babel)

Temporary fix for performance problems in Firefox (dragging nodes still creates memory leaks, but it does not automatically crash now).

Re-enable scope hoisting for parcel build versions.

Added fancy-scrollbar to the bottom-container

Also more refactoring.