* Revert "Fix graph element z-index (#2698)"

This reverts commit 35ab26308deb44e5166a288ef238b9d285445a00.

* Revert "Fix interval selector z-index (#2696)"

This reverts commit c307057386d01ccce7c1c0ef1e108f70ed7a383c.

* Set graph z-index to zero

* Add as={Fragment} to Transition component