EPPlus should adjust Workbook.View.ActiveTab after moving worksheets.

[swmal]

The follwoing logic should be implemented internally:

var activeSheet = package.Workbook.Worksheets[package.Workbook.View.ActiveTab];
package.Workbook.Worksheets.MoveToStart("test");
package.Workbook.View.ActiveTab = package.Workbook.Worksheets.ToList().IndexOf(activeSheet);