Moved load of filters or messages files after GTK has entered its main loop to avoid issue when reloading files!
Excluded "MESSAGES_ID_MAX" message from filter.
Removed unused function "ui_callback_on_tree_view_select".
Change logging level of some logs.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4321 818b1a75-f10b-46b9-bf7c-635c3b92a50f