Directional router modules can now face a label sign
Label signs will be considered part of the target block by the router
Fix bug where item routers could not be broken
Added a few more cases where a label sign is treated as the STB block it's on
Primarily some item router modules, but also the Multibuilder
Solar: ensure light meter is repainted when PV cell is inserted/extracted
GUI: default label button texture is now a book (suggesting information)