ListBox copy shortcut copies raw row text instead of going through CellCopying

Pressing the platform copy shortcut (Ctrl+C on Windows and Linux, Cmd+C on macOS) while a desktop ListBox has focus copies raw row text straight to the system clipboard using the underlying grid's built-in row-copy format, instead of going through Objo's copy pipeline. The CellCopying event never fires, ListBoxCopyData customisation is ignored, and the copied text follows the grid's internal multi-column format rather than the documented current-cell behaviour.

Expected behaviour: the shortcut copies the current cell through the shared copy pipeline, firing CellCopying and honouring custom text and cancellation, exactly like the Edit menu's Copy command.

User impact: any app that relies on CellCopying to shape or veto clipboard copies gets the wrong content from the keyboard shortcut, and the copy bypasses the Clipboard API entirely.