Remove unused var
Refactor edit PG logic.
Remove editProductGroup method
Added edit (for this) functionality, removed editProductGroup
Added edit (for this) logic
Remove editProductGroup, added notifyObservers
Updated test to reflect edit functionality
Updated test to reflect edit functionality
Update edit call to go directly to the selected SU
Remove setStorageUnitName
Updated edit(name) functionality for not changing name
Removed setStorageUnitName
Added test case for edit(name)