Issue description: Importers and Exporters don't respect redstone signals.

What happens: When I change the redstone config on the GUI, it always acts as if it was configured to ignore redstone.

What you expected to happen: I expected it to respect the config :D

Steps to reproduce:

1.Place a chest with an exporter/importer and set it to export one item from/for the system.
2.Change the redstone config to : "Only work with redstone signal"
3.It will export/Import anyway.
...

Version (Make sure you are on the latest version before reporting):

• Minecraft: 1.11.2
• Forge:13.20.2227
• Refined Storage: 1.4

Does this issue occur on a server? [yes]

If a (crash)log is relevant for this issue, link it here:

[pastebin/gist/etc link here]