| ⇢ | A | MigrateBackgroundImages::runMigration() added | |
| ⇢ | A | MigrateBackgroundImages::runPreparation() added | |
| ⇢ | A | MigrateBackgroundImages::storeUserIdsToProcess() added | |
| ⇢ | A | MigrateBackgroundImages::readUserIdsToProcess() added | |
| ⇢ | A | MigrateBackgroundImages::deleteStateFile() added | |
| B | ↗ | A | MigrateBackgroundImages::run() improved |