Short summary about the issue/question: Users need to find the information of job priority more friendly.

Brief what process you are following: Refine and add the Priority to the web UI of Job list and Job detail

How to reproduce it:

1. Add a new column of Priority (High, Product, Debug, Opportunistic) to Jobs' list.
   

2. Add a new filter item for Priority
   

3. Add the Priority info to Job detail page