only set datatype to 'str' if one of the values is non-numeric
Why:
if the first value is numeric, but the later values are not, for example ['1', 'FOO'], the entry will be set to numlit, but since the second entry is not a numeric, the ppt fails to open and requires repair.
The value should be set to 'strlit' if any of the values are non-numeric.
What:
Why: