Error on newmail after marking messages in last area in a group as read

```
PYTHON ERROR (/home/mystic/themes/rayzernet/scripts/rjam.mpy)
  File "/home/mystic/themes/rayzernet/scripts/rjam.mpy", line 2710, in <module>
    treelist()
  File "/home/mystic/themes/rayzernet/scripts/rjam.mpy", line 1733, in treelist
    ma_group = items[selbar]['groupid']
KeyError: 'groupid'

```