JSDoc template updates - cleanup and some changes

This focuses on
1. Making the documentation result _less_ verbose when it doesn't need to be and
2. Making the documentation _more_ verbose about deprecated and protected members

(1) is mostly benign, but change (2) may warrant discussion - The change is that calls "protected" methods "internal" methods to indicate that (and invoke the response of) being something designed to be used _internally_ by Phaser itself, but exposed for potential use. It also displays a note down in the "Deprecated/Internal" section indicating that internal methods are, well, internal ..