add tooltip callback. Paint craftables in blue. middle click to craft

from JEI

src/main/java/appeng/client/gui/implementations/GuiCraftingTerm.java

@@ -23,6 +23,7 @@ import appeng.api.config.ActionItems;
 import appeng.api.config.Settings;
 import appeng.api.storage.ITerminalHost;
 import appeng.client.gui.widgets.GuiImgButton;
+import appeng.client.me.ItemRepo;
 import appeng.container.implementations.ContainerCraftingTerm;
 import appeng.container.slot.SlotCraftingMatrix;
 import appeng.core.localization.GuiText;
@@ -81,4 +82,8 @@ public class GuiCraftingTerm extends GuiMEMonitorable {
     protected String getBackground() {
         return "guis/crafting.png";
     }
+
+    public ItemRepo getRepo() {
+        return this.repo;
+    }
 }