TrackWorks, adds all works to history

[jsmnbom]

TrackWorks works by opening the work page in the background and looking and the sub button, bookmark button and the kudos at the bottom. This means that each work that it checks gets added to the AO3 history.

This is definitely a bug, but I have no idea how to fix, as it's impossible to find out weather a work is subbed or bookmarked without one the following:

• Opening the work page (current, not optimal since we add it to history, and also we load a bunch of work text that we don't actually need)
• Paging through all of the user's subscriptions and bookmarks (some users have 2k+ bookmarks, so this really isn't viable)
• Looking at /kudos, /bookmarks for each work (needs multiple requests for each and every work, also not possible to do with subscribtions)

[jsmnbom]

Looks like a fix might be to use the current solution, but using Googlebot as the user-agent. According to https://stackoverflow.com/questions/42815087/sending-a-custom-user-agent-string-along-with-my-headers-fetch this might be impossible on chrome at the moment however.

Edit: Actually that might not be the case. my history simply isn't updated at all right now... I wonder if it's cached somehow... Edit2: Yea the history is cached for around half an hour. And from reading AO3 code, the user-agent has no influence on the history :(

[jsmnbom]

Next version will have track works removed entirely, and a hopefully better version implemented soon. That was the best fix I could do for now.