Limit inventory size by introducing dups as length increases, just as in the Windows version

main.js

@@ -656,8 +656,12 @@ function BoringItem() {
 }
 
 function WinItem() {
+  if (Max(250, Random(999)) < Inventory.length()) {
+    Add(Inventory, Pick(Inventory.rows()).firstChild.innerText, 1);
+  } else {
     Add(Inventory, SpecialItem(), 1);
   }
+}
 
 function CompleteQuest() {
   QuestBar.reset(50 + Random(100));