ElectricFieldReader: Wrong warning when using INIT field with depletion_depth

Summary

When using an INIT field with e.g. 25um thickness on a sensor with 100um thickness, the EFieldReader warns correctly about the differing sizes.

When setting depletion_depth = 25um this warning should go away as the thickness domain is altered. It is however still printed because the check is always against the detector thickness, not the thickness domain.

(Side not: a LOG_PROGRESS would be nice when reading & parsing the INIT file)\