since I have problems with edit mode PopUp I changed it to Inline.
But this brings up the next problems.
First - IE 11 vs. Google Chrome.
In Chrome I get Numeric-UpDown for numbers and "nothing special" for strings.
In IE 11 I get "Edit with Clear Button" for all Items (also numeric).
The real problem occurs when I make the Grid selectable (Row).
Using a DropDown I selecte something an this selects the row.
After the row is selected numeric fields no longer have values.
See the attached Image.