With this change, we've decoupled some partials shared between
`/pkgbase/{name}` and `/account/{username}/comments`. The comment
actions template now resolves its package base via the `comment`
instance instead of requiring `pkgbase`.
We've also modified the existing package comment routes to
support execution from any location using the `next` parameter.
This allows us to reuse code from package comments for
account comments actions.
Moved the majority of comment editing javascript to its own
.js file.
Signed-off-by: Kevin Morris <kevr@0cost.org>
