Fix password reset response

Parse as JSON the response of reset password
Redirect user to login page

When the user click on login redirect the user to the login page not to the root page.
Change the order of css file

The mobile.css must be the last file because it modify some style defined in other files
Improve mobile style
Correct reset page title
Improve error messages display

Create a second type of message: session message. Session messages are messages witch are not removed when the page page.