Allow uninstallation of packages via CLI
Fix check for CLI in SessionHandler
Fix error handling in CLI uninstallation
Fix formatting and add documentation for PackageCommand
Allow passing of PACKAGE_ID via argv
Merge branch 'master' into cli
Add missing language items and clean up a bit
Fix WorkerCommand
Execute worker first and update progress afterwards
Merge branch 'refs/heads/master' into cli
Cleans up code
Fixes issue in PackageCommand

'confirmInstallation' doesn't exist anymore
Further code cleanup
Improves file/class names
Improves package (un)installation finish
Fixes update text
Adds missing permission check
Merge branch 'refs/heads/master' into cli
Removes obsolete todo
Adds missing progressbar finish method call