adjust concurrent view layout, make the thread panels even share the screen estate

[llmhyy]

[SongXueZhi]

I submitted 9a87381a9cfb5a769290b069445277141a3d9f1b to address this task, but note that there are still bugs here. When the concurrent program code increases and decreases the number of threads, the next run can still only record the original code, unless the data in the database table is deleted. A new issue will be created to address this error.

[SongXueZhi]

the issue #203