Bug Fixes

This release fixes multiple bugs. At least 3 related to stuff messed up, because of false shellcheck recommendations.
Additionally, the Bash strict mode is disabled by default again: It simply caused too many problems and unexpected behavior. But it is only commented out and can be enabled easily again for testing purposes.

All fixes should result again in properly working 'Fix Pacman Errors', 'Maintain System', and 'Remove Packages' options.