Show Active Clients Count in the Working Staff Page

[GauravGusain98]

Describe the task
In ColoredCow we recently decided to work on a strategy called One Project One Resource where we are targeting that a resource should be involved in only 1 project.

Now when checking the count of projects a resource is involved in through Portal, the data is not enough since in many case 1 client have multiple small project which we want to considered as 1 project. This information is not available in the Portal.

On the working staff page, we currently show a number of active projects a resource is in. If we also have the active client count then it would be easier to calculate the count of project a resource is involved in.

Expected behavior
We want to have a column Active Clients Count after the column Active Projects Count on the working staff page.