Work on add-contact file: * Reworked the procedure in a numbered list * Checked termi...

Work on add-contact file: * Reworked the procedure in a numbered list * Checked terminology with the app * Added a note about the connection * Added a seealso link Add a new topic offline-contacts: * Small topic on how to see offline contacts and hide them * Inserted only in the add-contact page as seealso Update the license line with the 3.0 number as talked via email Update some topic form stub to draft