* glossary: replace cached by latest before edits
* docs(glossary): general cleanup and fix links
This commit addresses issues with the glossary for all languages (JS, TS, Dart).
Fixes#1123, #1838, #2036.
This was originally started as post-RC5 Dart resync, but since mixing Harp partials with Jade mixins can be problematic, this commit does a general cleanup of the 3 x 2 = 6 glossary files (found in `{ts,js,dart}/latest/{.,guide}`).
This commit builds upon #2098 (which created the first `ts/_cache` copy of the glossary), but doesn't really depend on it.
* post-review updates
* post-review updates
Patrice Chalin
Ward Bell
Josh Otis