Improve the selection of authors and reviewers

The enter key is now used to select a user instead of submitting the
form.
[fix] French and English typos
[Fix] Update the table of contents with the latest paper version

The table of contents was updated with the paper content of the previous
change. The table of content now uses the latest paper version.
[fix] Fix the foreground color of the connected user list

Only the foreground color of the label have to fit to the background
color
[add #143] Simplify the creation of a paper

The title filed is autocompleted with the value of the name field.
[fix #139] Disallows ":" in username

Restrict the use of ":" (colon) in the username