Some improvements on WebUI

[rabbit008]

1.The coordinate name in the current intermediate result graph ("Intermediate") is not the same as the title of the table ("Intermediate Count"), which may make users feel confused.

2.Currently, we have 7 optional columns available, this 1.1-release will add new columns like starttime and endtime, maybe we need to limit the maximum number of columns added to the table.

[scarlett2018]

use # Intermediate Result for both then.

[rabbit008]

For the second question:

1. Do not limit the number of columns;
2. For the part that exceeds the display width, add a scroll wheel to the bottom of the table to view all.