Fixes #7144
Fixes bubble/hull shield generators not updating air zones, update_nearby_tiles() cleanup.
Merge pull request #7139 from mwerezak/shield-zas

Fixes bubble/hull shield generators not updating air zones, update_nearby_tiles() cleanup.
Merge pull request #7159 from mwerezak/logo

Fixes broken [logo] tag
Merge branch 'master' of https://github.com/Baystation12/Baystation12

Conflicts:
	code/modules/shieldgen/energy_field.dm