Added filtering by order's channel to OpenBay Pro's Bulk Order Update tool.
SQL Fix.
Removed OpenBay Pro changelog entries as they belong else-where.
Merge pull request #1524 from Martynas-P/v1.5.6.x

SQL Fix
Merge branch 'v1.5.6.x' of https://github.com/opencart/opencart into v1.5.6
Merge branch 'v1.5.6' of https://github.com/openbaypro/OpenBay-Pro into v1.5.6
Changed the way the requirement checks are done.
Added version checking and alert message if vqmod files are found.