/// start. If the selection is inside only one cell, nothing is done. Return
/// true if the selection now does not span multiple cells anymore.
bool reduceSelectionToOneCell(Cursor & cur);
/// start. If the selection is inside only one cell, nothing is done. Return
/// true if the selection now does not span multiple cells anymore.
bool reduceSelectionToOneCell(Cursor & cur);
/// Erase the selection and return it as a string.
/// Does not handle undo. Does only work if the whole selection is in mathed.
docstring grabAndEraseSelection(Cursor & cur);
/// Erase the selection and return it as a string.
/// Does not handle undo. Does only work if the whole selection is in mathed.
docstring grabAndEraseSelection(Cursor & cur);