[LDCad] Merge several .mpd files into one

[Milan Vančura]

Nested select all copy paste should work (visually wise), so those are bugs.

edit:
Just checked with 5510, which worked (wheels wise) so are you sure you are using 1.6d?
The strings not going trough isn't technically a bug though, as those meta's are only allowed in a managed content subfile so they will be filtered out during the paste action into a normal subfile.
end of edit

For some unknown reason, I lost all my configuration of 1.6d, 3 days ago, so I temporarily use 1.6c. If you think this is a bug solved in 1.6d, I find time to test my usecase in 1.6d as well. However, hoses and strings are important parts of models, I cannot loose them during copy&paste. So if there is no way to tell ldcad to keep them, this way of copying models is a no-go for me anyway. Unfortunately - because, otherwise, this method works better in mycase - it copies the result model only, without STEPs and buffer exchange.