save state when clearing logs

Dependencies

• [2] PE7QD5GR source editor: clear logs
• [*] KKMFQDR4 editing source code from within the app

Change contents

• edit in source.lua at line 370
  [2.155]

  [2.155]
  + Settings.source = source.settings()
• edit in source.lua at line 372
  [2.173]

  [2.173]
  + love.filesystem.write('config', json.encode(Settings))