React Toolbox Files

This new version include some major updates and new components 🎁: - Now components using an Overlay that are can be inactive (for example Dialog or Drawer) are not rendered if they are not active. We preserve the animation thanks to a two step rendering (see [#444]) - App component is no longer needed. From now on we are blocking the body overflow in components with Overlay. You can stop wrapping you whole application if you want. - Chip component and Autocomplete uses it (thanks @lucaas) - Layout components including a responsive NavDrawer, main Panel and SideBar (thanks @patrick-jones) - Improvements in the documentation and props validation (thanks @KerenChandran) - Many other bugfixes and small improvements.

Sorry for the last 2 patches, 💩 happens !