Bump kicad + wxwidgets submodules with two wasm eeschema UI fixes, and add the
regression test tests/kicad/eeschema-ui.spec.ts (Delete + Backspace delete; the
text-tool properties dialog opens and closes without freezing).
- wxwidgets c27fe8b: nested (quasi-modal) event loops pump via Asyncify instead of
re-entering emscripten_set_main_loop (which threw an un-resumable 'unwind').
- kicad 4132395: bind Backspace to delete under emscripten + apply default alt hotkeys.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
