Let user choose which grid the morph is returned on

[Sparks29032]

If a user morphs objective.gr to match target.gr, the returned morphed function morph.gr will be on the grid of target.gr. The user should be able to select whether they want this or for morph.gr to be returned on the original grid of objective.gr. This can be done by creating a parameter to toggle the last application of MorphRGrid().

[sbillinge]

"should" is a very strong word. Do we have a UC or a specific request from a user for this? Let's keep it open but no need to implement it until we have a clear idea why it would be needed.