Adds a 600ms wait between the wxFileDialog appearing in the registry and
the screenshot in tests/kicad/pl_editor.spec.ts. Without it, the dialog
object exists but its MEMFS readdir (asyncified) hasn't returned yet, so
the screenshot caught a half-painted black rectangle — fine for the
registry-based assertion but useless as a pixel baseline.
Commits the 10 pl_editor screenshots produced by the spec as the baseline
reference under tests/baseline-screenshots/.
Bumps the wxwidgets submodule pointer to pick up the expanded comment on
the wxGenericFileDialog::OnOk fix (explains why the patch lives in the
generic dialog instead of src/wasm/ — OnOk is the join point for both the
OK button and <Enter> via the dialog's compile-time event table, so
subclassing in wasm/ wouldn't intercept either).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
8fd78d42b2