Bug fixes after the last release

• fix(migrator): use the correct batch number when no batch is defined during rollback aa3b50b
• refactor: improve visual outlook of migration:status command 84b7447
• fix(MigrationSource): use appRoot for reading migrations 0b9e0b0
• fix: register correct paths to ace commands e016fdc

v7.2.1-0...v7.2.1