The move_cursor signal is a [keybinding signal][class@Gtk.
SignalAction] which gets emitted when the user initiates a cursor movement.
Applications should not connect to it, but may emit it with emit_by_name if they need to control the cursor programmatically.
The default bindings for this signal include - Arrow keys which move by individual steps - Home/End keys which move to the first/last item - PageUp/PageDown which move by "pages" All of these will extend the selection when combined with the Shift modifier.
the granularity of the move, as a `GtkMovementStep`
the number of
whether to extend the selection
whether to modify the selection