Fix fdo#38884 Improve Up/Down movement in writer


- It was provided, but the X-Position was reset after the cursor Up/Down

- But in the Table is the X-Position not right -> other bug

Change-Id: I2d70b7dc4ffa1e2612330d9b30ea5d916f5a9439
Reviewed-on: https://gerrit.libreoffice.org/11500
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>