Revert "Fix updating current E value"
Revert "Fix updating current E value"

This reverts commit 80f8760f68b75f56b83283d6a700436fa4a8594d.

Contributes to issue CURA-2795.

ROBO3D/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine