Copy config.js to a single config.js-old file whenever a config.template is present, instead of using Date() as a suffix. Creating files with a timestamp suffix means that whenever Magic Mirror is restarted or recreated a new file is written into the config directory.

Benefits:

• Single backup file will avoid excessive writing of files
• Saves space and usage on SD cards.
• Makes the folder cleaner and easier to overview, compared to ending up with something like this as time goes on: