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login should be redirect to the page one was on
On Stack Overflow and its sister sites as well as on Wikipedia and its sister sites, if you're on page X and click "Log In", you get to the login page (true here too). If you then log in, you get taken back to page X (not true here). That would be a nice feature here. Nothing terribly urgent (a double browser-back-button click and a reload will get us the same result).