Filter/Sort by "Run As User" in Cluster Manager

#### Feature Request Description

In HPC Pack 2019 Cluster Manager (6.2.7756.0)

We have a "super-user account" that can launch jobs for other users with `job submit /user:xxx` - so in the HPC Cluster Manager I can see the job owner, and the Run As User columns. But I cannot either sort by, or filter by "Run As User" in the interface. Clicking on the "Run As User" column doesn't do anything, and the Filter only allows me to filter by the "Owner", not the "Run As User".

This makes it really hard to find a particular job with a problem in the HPC, when launched in this way.

#### Describe Preferred Solution
Being able to see all jobs that were "Run As" the same user - either by filtering, and/or showing them together.

#### Describe Alternatives Considered
I guess other methods involve just coding something in C# with the API?