PlatformConfiguration blocks splash screen during startup

I think this screenshot describes the problem better than words possibly could:

When launching the Eclipse IDE from my workspace, I usually get stuck with the splash screen for up to two minutes. At least when doing a cold start. If I start it again, it "only" takes ~15s for the application to show up.

Almost all of the time is spent on starting the `PlatformConfiguration`, which in return is held back by I/O access. This might be a similar problem as #1572.

## Community

- [x] I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.