Archetype id rename doesn't rename file, enabling subsequent clash.

[wolandscat]

The following steps will fail:

• start with an archetype 'aaaa' under any class in any RM
• edit it in AWB via the ADL tab, and change the id to 'bbbb' & save
  • => causes archetype 'bbbb' to be saved in file 'aaaa'
• now create a new archetype 'aaaa'
  • => this will be saved over the top of the 'aaaa' file, deleting the 'bbbb' archetype from the system

to avoid this, any rename has to cause a file-level rename as well.