Use gtk_notebook_set_current_page() instead of
document_open_file_full() when choosing an item from the documents
list.
Avoid using goto in document_open_file_full().



git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@4151 ea778897-0a13-0410-b9d1-a72fbfd435f5