Expand description
Wire method: nativeHost:showOpenDialog.
Delegates to NativeDialog::ShowOpenDialog::ShowOpenDialog. This atom
preserves the stable handler name while the actual file/folder picker
lives under the NativeDialog domain (filter parsing, DialogFilter DTO,
etc. each in their own atom). Prior stub returned canceled:true, which
silently broke “Install from VSIX…”; delegation restores correctness.