Fixed a typo in the pyicon_calculate_xr file

See merge request m300602/pyicon!9

pyicon/quickplots/qp_compare.py: Allow for optional reading of simulation namelist to avoid errors when namelist cannot be found.

pyicon/pyicon_tb.py: Added option for automatic fpath_ckdtree recognition. Added option in Triangulaiton to shift grid wrt dateline.

pyicon/pyicon_plotting.py: Added new plotting object to facilitate generation of axes and passing them to plotting routinse.

This reverts commit e9db8c32.

This reverts commit bb3e5552.

pyicon/pyicon_plotting.py: Always use always interp_to_rectgrid_xr instead of using both interp_to_rectgrid_xr and interp_to_rectgrid.

[pyicon_dwd] Difference plots for the atmosphere, area weighted horizontal mean of fields, new fields for atmosphere plots, etc.

See merge request m300602/pyicon!7

[pyicon_dwd] Rewrite optional restriction of time-series plots to the intervall tave_int: introduce use_tave_int_for_ts. The tools/run_qp_* scripts are also updated accordingly.

[pyicon_dwd] qp_compare_atm_dwd.py: skip SST and sea-ice fraction if the difference between 2 exps is zero