I got a suggestion about the user interface of
universal thread.

Is it possible to display the map produced from "searching
messages by calendar" on the upper right frame rather than
the bigger lower right frame?

The biggest frame is supposed to display individual message.
By displaying the map there, users would have to click [back]
to reload the map so as to select another message.

It is also inconsistent with login behaviours when the map
containing the un-read messages are displayed on the upper
right frame.