B5: Multi convert transformations: Resize parameters

[helmut]

Not really a bug in 1.90, but something that I'd like to see changed a.s.ap.:

Multi convert transformations: Resize parameters

For the 1.90 it would be sufficient to change the default setting to "Lanczos".

@Pierre: I've just seen that you have introduced the tree structure in the transformations. That's really very good and makes the good handling of transformations even better. Very good!

[Olivier_G]

For the 1.90 it would be sufficient to change the default setting to "Lanczos".

Implemented in beta 6.