New translations strings_en.properties (Bulgarian)

src/main/resources/com/deeme/lang/strings_bg.properties

@@ -372,6 +372,8 @@ buy_item_conditions.quantity=Quantity
 quantity_condition=Quantity condition
 quantity_condition.min_quantity=Buy if less than
 quantity_condition.min_quantity.desc=When the quantity of the item is below the marked quantity, the condition is activated.
+quantity_condition.item_to_control=Item to use to check
+quantity_condition.item_to_control.desc=This is the item that the bot will use to check the amount it has and activate the condition if it is below that amount.
 
 anti_train=Anti Train
 anti_train.max_enemies=Enemies to consider a train