Refactor reply action.
Drastically clean up new topic view.
Refactor new topic action.
Rename admin handlers so that they match view names.
Remove TODO.
Create LaravelUrlGenerator class for URL generation in views etc.
Fix new topic error request.
Get rid of reply page - quick reply only.
Add and implement an URL generator interface.
Fix subscribe typo.
Remove last references to reply page.
Store current request so that we can easily generate the canonical URL.