Offloading materials

[Kalyke]

Check here for more details.

@NianticNY

Changes to the offloading materials.

• When the number field value is zero (0), tapping the minus button (-) will no longer automatically set it to the current quantity of that material.
• When the number field displays the current quantity of the material, tapping the plus button (+) will no longer automatically set it to zero.
• These changes are to prevent accidental offloading of materials. To offload a large number of materials, please tap the number field to directly enter the quantity.