Changes:
- Added a way to enable debug mode and provide more information when possible
- Repository installation commands are now generated by selecting the desired repositories > Install
- Fixed #247 (The repo duplicating task is still running even after being canceled by the user)
- Fixed #248 (Undescriptive Error while uncompressing Packages.xz problem)
- Prevented the selection of multiple release versions when creating a new repository #245
- Various UI improvements