Only update building names/costs if needed

gorge.js

@@ -269,8 +269,18 @@ function displayBuildings() {
 
     const buildingCost = costOfBuilding(key, count);
 
-    name.innerText = value.count + " " + (value.count == 1 ? buildings[key].name : buildings[key].plural);
-    cost.innerText = render(buildingCost.food) + " food";
+    const newName = value.count + " " + (value.count == 1 ? buildings[key].name : buildings[key].plural);
+    if (newName != states.buildings[key].name) {
+      name.innerText = newName;
+      states.buildings[key].name = newName;
+    }
+    
+    const newCost = render(buildingCost.food) + " food";
+    if (newCost != states.buildings[key].cost) {
+      cost.innerText = newCost;
+      states.buildings[key].cost = newCost;
+    }
+
 
     if (canAfford(buildingCost) && available !== true) {
       button.classList.remove("building-button-disabled");
@@ -489,7 +499,9 @@ function initializeBuildingStates() {
   Object.keys(buildings).forEach(key => {
     buildingStates[key] = {
       visible: undefined,
-      available: undefined
+      available: undefined,
+      name: undefined,
+      cost: undefined
     }
   });