Expand removeCharactersInvalidInLionWebIDs to cover some replacements

[ftomassetti]

We repeat over and over code such as:

        val cleanName = name!!.replace('.', '_').replace(' ', '_').replace("@", "_at_")
            .replace("#","-").removeCharactersInvalidInLionWebIDs()

All this logic could be inserted in a function, perhaps expanding the functionality of removeCharactersInvalidInLionWebIDs and turning in String.canonicizeForLionWeb()