Hi Svetoslav
In your example the problems are:
1. every column has width: 50%, 40% and 10%, but but the widths of the columns do not match the width of the table.
2. The last column is “button” type column, but the location is in the middle of the table columns.
You can see the problem, if you comment in:
//autoloadstate: true,
//autosavestate: true,
Best wishes,