Merge pull request #304 from Ryex/move-downloads

Fixes https://github.com/PrismLauncher/PrismLauncher/issues/222

launcher/FileSystem.cpp

@@ -149,6 +149,9 @@ bool ensureFolderPathExists(QString foldernamepath)
     return success;
 }
 
+/// @brief Copies a directory and it's contents from src to dest
+/// @param offset subdirectory form src to copy to dest
+/// @return if there was an error during the filecopy
 bool copy::operator()(const QString& offset)
 {
     using copy_opts = fs::copy_options;