Inventory: page to balance item one-by-one
Related #82 (closed)
Add a page to the inventory system to balance inventory products one-by-one.
The app may suggest to balance active inventory products when they haven't been balanced for more than a few hours. The user submits each balance, showing a new one afterwards, until unbalanced active products have been drained.
This is a different flow to balance products requested by a user, versus the mass-balance page