Remove unused code
Fix possible byte sequence errors when saving output file
Add FileDialogs::open_dialog
Add Utils::get_documents_dir, Utils::make_output_filename
Use Utils::get_documents_dir, Utils::make_output_filename
Add Config::addSetting
Change Utils::error_dialog into Utils::message_dialog, adapt for changes
Fix OutputManager::saveBuffer for multibyte chars
Add ReplaceListManager
Simplify tree view column resizing
Update TODO
Update translations