Sorting runs by creation date

[didmar]

Is your feature request related to a problem? Please describe.

When browsing the runs list, there is no way to identify the newer ones.
This makes it harder for reviewers to identify the test runs that they need to check.

Describe the solution you'd like

Add a "Creation date" column to the runs list, and the option to sort by ascending or descending date in the "Sort by" dropdown.
For the old runs, a default creation date will be set (e.g., today's date).