These lines are marking products, for which a counted quantity was set, but not applied, then a move (a receipt or a delivery) was validated, which changed the "on hand" quantity, so the yellow lines are Odoo's way of drawing attention to the changed "on hand" quantity. 

The "on hand" qty shown in the yellow line is already the updated quantity, after the move has taken place. 

The yellow lines can be fixed the following ways:

1. If the quantity on hand is correct after the move and there is no need for inventory adjustment anymore: Click on the "Clear" button.

2. If despite the move, the counted quantity is still valid: Click on the "Apply" button.

3. If, after the move the counted quantity needs to be revised: Update the "Counted quantity" and Click on "Apply"