void TabControl_Drop(object sender, DragEventArgs e)
{
var files = (string[])e.Data.GetData(DataFormats.FileDrop);
if (files.Length > 0)
{
var move = Keyboard.Modifiers == ModifierKeys.Shift;
var process = move ? "Move" : "Copy";
var confirmBox = new ConfirmBox($"{process} file", $"Move already existing cards\nto the current category (if any)?");
var reorganize = confirmBox.ShowDialog().Value;
foreach (var file in files)
{
SelectedTab.AddImageFromOutside(file, move, reorganize);
}
}
}