Mouse scrolling makes it crash

[dobin]

When mouse scrolling around, protectmytooling can crash with:

PS C:\training\Tools\ProtectMyTooling> python .\ProtectMyToolingGUI.pyw
Traceback (most recent call last):
  File "C:\training\Tools\ProtectMyTooling\ProtectMyToolingGUI.pyw", line 677, in <module>
    main()
  File "C:\training\Tools\ProtectMyTooling\ProtectMyToolingGUI.pyw", line 541, in main
    cur_index[0] - 1) % window.Element(element).Widget.size()
IndexError: tuple index out of range

• start
• go into "packers chain" (empty)
• scroll