Create ability to see edit Issue Hours in the work load balancer - same as task hours can be edited. This is needed to agile teams to manage backlog workloads

[#1]

Currently the workload balancer does not permit issue hours to be modified per user/per day - the same way task hours can be edited. This is needed for Agile functionality so backlog work can be assigned - with specific hours per day during the iteration period. Currently the planned hours can only be rearranged - This doesn't permit true resource utilization data.