Login should be even more friendly
The new simple login is great, however it should say something nice like "Welcome to <sitename>", and maybe explain why you need to login.
Example:
Welcome to MoinMoin Wiki!
You must login to edit FooBar.
username: [ ]
password: [ ]
[[Login]]
A wiki owner may like to customize such message, like MissingPage. This can be implemented as a real login page with a macro, like UserPreferences.
To support login on-the-fly, a redirect url parameter can be added to the login form e.g
<form method="POST"> <input type="hidden" name="redirect" value="url"> ... </form>
So when you try to edit page FooBar, you are sent to page Login, which redirect you to url on successful login, or send you again the login form when you fail.
Duplicate of FeatureRequests/NotifyUserWhenLoginRequired