Initial username can include spaces

src/freedombone-image-customise

     echo '  exit 0' >> $START_DESKTOP
     echo 'fi' >> $START_DESKTOP
     echo '' >> $START_DESKTOP
-    echo 'INITIAL_TOX_USERNAME=' >> $START_DESKTOP
-    echo 'while [ ! $INITIAL_TOX_USERNAME ]; do' >> $START_DESKTOP
+    echo 'INITIAL_TOX_USERNAME=""' >> $START_DESKTOP
+    echo 'while [ ${#INITIAL_TOX_USERNAME} -eq 0 ]; do' >> $START_DESKTOP
     echo '  data=$(tempfile 2>/dev/null)' >> $START_DESKTOP
     echo '  trap "rm -f $data" 0 1 2 5 15' >> $START_DESKTOP
     echo -n "   dialog --title \"${MESH_TITLE}\" " >> $START_DESKTOP
     echo '  case $sel in' >> $START_DESKTOP
     echo '      0)' >> $START_DESKTOP
     echo '          INITIAL_TOX_USERNAME=$(<$data)' >> $START_DESKTOP
-    echo '          if [ ${#INITIAL_TOX_USERNAME} -lt 1 ]; then' >> $START_DESKTOP
-    echo '              INITIAL_TOX_USERNAME=' >> $START_DESKTOP
-    echo '          fi' >> $START_DESKTOP
     echo '          ;;' >> $START_DESKTOP
     echo '  esac' >> $START_DESKTOP
     echo 'done' >> $START_DESKTOP