The way Danbooru handles passwords is simplistic to stay the least. It's
also impossible to know the "password salt" without visiting the API
page. As such, "salts" need to be put along with the board they
originate from.
The code doesn't handle missing keys, hence this TODO.
Don't use winId as it breaks QQuickWidget (see Qt docs)
Add an isAnonymous() function to check whether the login is there or will not be used
Properly set passwords in the wallet
Do the hashing properly
