vis: Make new tests more visible

Currently, to find the new tests in the visualization you have to go to "shards all" view and then search in the page for new tests names.

With #11 we will already start using data from cibuglog for the visualization of the results.

We can do similar thing with information about new tests (cibuglog already has logic for finding them, example).

With that included in the .json we could have the new tests on the combined views and/or we could highlight them somehow.