MigrationPro Ultimate: Migration, Migrate & Upgrade 4.4.8

Improvement when migrating data from PrestaShop 1.7 to PrestaShop 8.1.4

Update module name to "MigrationPro Ultimate"

Update "PrestaShop Connector" module

• Fix bug when installing on PrestaShop 1.6
• Fix bugs for some specific cases

• Edit Copyright & author name

• Fix bug: SQL queries

• Update compatibility with PrestaShop 8.0.0

• Minor change

• Fix bug while migrating data from 1.4 to 1.7.8.5

• Solved missing customer data problem