Locked Map Duplication via Anvil Rename

Steps to Reproduce:
1. Have stack of maps (more than one of same locked map)
2. Place in anvil with intent to rename 
3. Provide new name and shift click anvil result slot to pull items out

Observed Results:
original stack of maps is reduced by 1 but otherwise remains - the original total of maps to be renamed is added to inventory

Expected Results:
all maps in stack are renamed - starting number of maps == resulting renamed number

More Detailed Example:

• have 20 of same map named `Map 35` in stack
• anvil rename stack to `MY BASE`
• results - stack of 19 of `Map 35` remains and stack of 20 of `MY BASE`