Find way to preserve exit wave between simulations (for CTEM)

[JJPPeters]

For CTEM image simulations, the exit wave does not need to be recalculated when the aberrations change (only for voltage, etc...). It could be possible to preserve the exit wave simulation so it does not need to be recalculated (if possible), though this is made tricky by the use of threads and multi-device support.