fix: title screen UIs can be closed using ESC

src/net/torvald/terrarum/ui/UIAutosaveNotifier.kt

@@ -14,6 +14,10 @@ import kotlin.math.roundToInt
  */
 class UIAutosaveNotifier : UICanvas() {
 
+    init {
+        handler.allowESCtoClose = false
+    }
+
     companion object {
         const val WIDTH = 180
         const val HEIGHT = 24

src/net/torvald/terrarum/ui/UINSMenu.kt

@@ -67,6 +67,7 @@ class UINSMenu(
     var invocationArgument: Array<Any> = arrayOf(this)
 
     init {
+        handler.allowESCtoClose = false
         addSubMenu(tree)
     }