FOrcaSlicer 2.3.2-fos.8.5.2

Hotfix over 8.5.1. One crash fix, no new features.

Fixes a crash when adding the Snapmaker U1 on a fresh install

On a fresh install, adding the Snapmaker U1 (mixed-nozzle PTP) could crash immediately
with no error message. This is fixed.

If 8.5.1 crashed for you while setting up the U1 on a clean machine, update to 8.5.2. If
8.5.1 already ran fine for you, 8.5.2 behaves identically apart from no longer crashing on
that setup path.

No other changes

Everything from 8.5.1 (per-nozzle line width on painted color patches; Nozzle 1 keeping its
own process preset) is unchanged.