Shuffle: Add importsequencenumber

[rappen]

A new feature to att importsequencenumber with a unique number.
Same number for all import, the number can be random or manually set by user.
If random, it should be a new number for every "start import".

Now easier to track new imported records.

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• Deployment: Online
• DB Version: 9.2.21113.132
• Connection Controls Version: 1.2021.9.46
• XrmToolBox Version: 1.2021.12.53
• Tool Version: 1.2021.3.1