A dialog for File->Merge

[micheus]

Oort, as in the same way I did for selection groupbox - that is disabled if no Objects will be imported - I intend to make availabe only the selection option that are apropriate to the file being imported. There is no reason to have the option "replace" or "add to" if there is no selection into the scene being loaded.
Add a option to create a "new" selection can be added for that situation. Or something like "make all current" would be a better option?

Thanks.