[Lazarus] Trunk: target cpu/OS settings are saved even when not saving project

[Reinier Olislagers]

On Laz trunk, with multiple build modes, I changed target OS and CPU,
then closed the project, discarding changes.

Reopening the project however, the target OS and CPU were modified which
I hadn't expected.

Just FYI in case the devs didn't know this one... ;)

Thanks,
Reinier