Issue Description:

Found duping bug with the filters of a backpack. I was using multiple filters not sure if it will affect the replication of the bug.

I should mention I was using Direwolf20's new 1.10 modpack

What happens:

double clicking an item that is in a filter when in shift rightclick of the backpack

What you expected to happen:

nothing

Steps to reproduce (important):

1. shift right click on back pack with a filter upgrade
2. place item in filter slot
3. double click item in inventory that is in filter slot

link to a short vid of the bug https://youtu.be/k5axE2UCBHU

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Affected Versions (Do not use "latest"):

• IronBackpacks: 1.10.2-2.2.13
• Minecraft: 1.10.2
• Forge: 12.18.2.2124

Thanks for the bug report! (And the helpful video)

New build should be up shortly with the fix.