mapArtMode has some issues with carpet maparts

## Some information
Operating system:happens across all operating systems I'm using(arch linux and a vm with windows 10)
Java version:1.8
Minecraft version:1.12.2
Baritone version:baritone-api-forge-1.2.15
Other mods (if used): schematica

## How to reproduce
1)Have a map art with a lot of carpets
2)Set mapartmode to true
Then it will have some really strange issues, but mainly it will place a carpet and then it will either break and place it repeatedly or it will just jump over it repeatedly

## Modified settings
#mapartmode true

A good and easy fix it would be a new setting which could be named mapArtBuildOnlySupportLayer, which would care about the block under the top one in the schematic

## Final checklist
- [x] I know how to properly use check boxes
- [x] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used).
- [x] I have included logs, exceptions and / or steps to reproduce the issue.
- [x] I have not used any OwO's or UwU's in this issue.