Start implementation of low tuning bass fix feature
Finish implementation of Low tuning bass fix. Add delete source file feature
Merge from upstream/master
Cleanup code and add button disable/enable while process is running
Fix Enabled = false for low tuning fix button after canceling file dialogs
Merge pull request #187 from zerkz/FEATURE/low-tuning-bass-fix

FEATURE: Low Tuning Bass Fix featuer in DLC Packer/Unpacker Tab