Update Language Files and implemented in GUI

Update Config File

src/main/resources/assets/craftingkeys/lang/de_DE.lang

@@ -10,6 +10,9 @@ key.lowercenter=8. Unten Mitte
 key.lowerright=9. Unten Rechts
 key.stack=Stack Taste
 key.interact=Interaktions Taste
+key.drop=Drop Taste
+
+options.numpadEnabled=Aktiviere Num pad
 
 # Control Category Name
 key.categories.craftingkeys=Crafting Keys

src/main/resources/assets/craftingkeys/lang/en_US.lang

@@ -10,6 +10,9 @@ key.lowercenter=8. Lower Center
 key.lowerright=9. Lower Right
 key.stack=Stack Key
 key.interact=Interaction Key
+key.drop=Drop Key
+
+options.numpadEnabled=Enable Num Pad
 
 # Control Category Name
 key.categories.craftingkeys=Crafting Keys