Revert "Hide rank numbers on the front page."

This reverts commit 3075ac1682d9ea343e3f2d604c0a43931f1ab6a6.
PromoteReport: exclude end hour to avoid double counting.
Delete RTL-specific styles.
Makefile: fix typo in clean_names.
Don't show duplicate links in house links listing.
WebSockets: websafe_json all payloads to prevent XSS.
Move stripe secrets to vault.
Move Authorize.net secrets to vault.
Move paypal secret to vault.
Move coinbase_webhook to vault.
Move redditgifts_webhook to vault.
POST_comment: delete unused `is_comment`.
Message.add_props: Delete obsolete incorrect comment.
Message: Don't check to_id when determining if an item is new.
PromoteListingController: return 403 for non-sponsors on special sorts.
Use a MoreRecursion for too-deep child comments.
Use a different inventory factor for default frontpage subreddits.
[OAuth2] Don't send unnecessary modhash to OAuth clients
OAuth2: Expose several endpoints

Endpoints getting "read" scope:
* /api/search_reddit_names
* /api/subreddits_by_topic
* /api/recommend/sr/{srnames}
* /subreddits
* /subreddits/new
* /subreddits/popular

Endpoint getting "modconfig" scope:
* /r/{subreddit}/about/edit
/dev/api: Put /api/store_visits in the API docs

api_doc notes' plumbing was changed slightly so
that VGold() endpoints automatically state that
they require a gold subscription in the docs.

"save" OAuth2 scope added to the store_visits endpoint.