Important bug fix and a minor update

I have now finally fixed the serious bug which prevented i18nlayers such
as the group presentations to be editable. Everything is back to normal,
you should now be able to edit away without worrying. Whew!

I have also made a minor update to the "information header" on the home
page of a user: all groups and schools that the user belong to are now
links, as well as her email address (if it is shown). I have replaced the
"Send Message" button with a "Send me a message" link. This takes you to a
form where the user name is already filled in.

I am still not completely happy with the format of this header, but it'll
have to do for now.

Jesper


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