Fix loading of `xls_sheet` and `xls_range` in mom
The problem is caused by dseries#51 and was reported in https://forum.dynare.org/t/mom-in-dynare-5-0-does-not-load-correct-xls-sheet/19693
Edited by Johannes Pfeifer
The problem is caused by dseries#51 and was reported in https://forum.dynare.org/t/mom-in-dynare-5-0-does-not-load-correct-xls-sheet/19693