Im working on an update to my old CDNJS plugin. The new version integrates into the Editor AutoCompleter.
So all you have to do, is type the first chars of the javascript (or css) you need. Then activate the AutoCompleter and select the file.
If AutoCompleter is activated without typing any chars first, it will display any local files found in current folder.
If anyone is interested in betatesting it, send me a PM.