A collection of fixes (#152)

* Fix the adv blocking mode setting shown w/o upgrade

* Use else ifs instead of ifs when looking for button

* Register dual p2p interface to interface term

* Fix moving inventory region when space is held

* Fix scrollbars not initialized when terminal is empty

* Fix fluid handling for the 3rd time

Rearranges the steps to insertion and validates whether the tank can be
drained.

* Fix fluid extraction for the 3rd time

src/main/java/com/glodblock/github/proxy/CommonProxy.java

@@ -4,6 +4,7 @@ import net.minecraft.item.ItemStack;
 
 import com.glodblock.github.FluidCraft;
 import com.glodblock.github.common.Config;
+import com.glodblock.github.common.parts.PartFluidP2PInterface;
 import com.glodblock.github.common.tile.TileWalrus;
 import com.glodblock.github.crossmod.extracells.EC2Replacer;
 import com.glodblock.github.crossmod.thaumcraft.AspectUtil;
@@ -15,6 +16,7 @@ import com.glodblock.github.util.ModAndClassUtil;
 import appeng.api.AEApi;
 import appeng.api.IAppEngApi;
 import appeng.api.config.Upgrades;
+import appeng.helpers.InterfaceTerminalSupportedClassProvider;
 import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.event.FMLInitializationEvent;
 import cpw.mods.fml.common.event.FMLPostInitializationEvent;
@@ -63,6 +65,7 @@ public class CommonProxy {
             Upgrades.CRAFTING.registerItem(new ItemStack(ItemAndBlockHolder.FLUID_EXPORT_BUS), 1);
         }
         AEApi.instance().registries().externalStorage().addExternalStorageInterface(new AEFluidInterfaceHandler());
+        InterfaceTerminalSupportedClassProvider.register(PartFluidP2PInterface.class);
     }
 
     public void registerRenderers() {}