Fix unloader arrows not resetting when picked up

Hopefully for the last time...

core/assets/features

@@ -42,6 +42,7 @@
  * Player List Assist - None (Regular), Shift (Free Move), Ctrl (Follow Cursor), Alt (BuildPath)
  * Click Assist - Shift (Regular), Shift + Alt (Free Move), Ctrl (Follow Cursor), Ctrl + Alt (BuildPath)
  * Shift {schematic_menu} - Schematic browser
+ * {force_place_modifier} {select} - Force places selection/schematics by marking overlapping buildings for deconstruction and placing overlapped plans into frozen queue.
 
 # Commands
  * If you're unfamiliar with mindustry command syntax, <name> indicates a required argument, and [name] an optional one
@@ -122,6 +123,7 @@
 # Vanilla Modifications
  * Shift click up/down in schematic tag list to send to top/bottom respectively
  * Shift click delete in schematic tag list to delete tag without prompt
+ * Alt {pickupCargo} pick up buildings but not units
 
 # Credits
  * Game by anuke, client by foo, buthed010203, Zxtej, SBytes, and BalaM314

core/src/mindustry/input/InputHandler.java

@@ -11,8 +11,8 @@
 import arc.scene.*;
 import arc.scene.event.*;
 import arc.scene.ui.layout.*;
-import arc.struct.*;
 import arc.struct.Queue;
+import arc.struct.*;
 import arc.util.*;
 import kotlin.Pair;
 import mindustry.*;

core/src/mindustry/world/blocks/storage/Unloader.java

@@ -279,6 +279,15 @@ public void buildConfiguration(Table table){
             ItemSelection.buildTable(Unloader.this, table, content.items(), () -> sortItem, this::configure, selectionRows, selectionColumns);
         }
 
+        @Override
+        public void pickedUp() {
+            super.pickedUp();
+
+            lastDumpFrom = null;
+            lastDumpTo = null;
+            lastItem = null;
+        }
+
         @Override
         public Item config(){
             return sortItem;