Fix being unable to load NBT in web viewer

lib/consts.dart

@@ -9,7 +9,7 @@ class TTConsts {
   static get SESSION_SERVER =>
       "https://api.zontreck.com/timetrack/$UPDATE_CHANNEL/timetrack.php";
 
-  static const VERSION = "1.0.0-beta.19";
+  static const VERSION = "1.0.0-beta.20";
 
   static bool UPDATE_AVAILABLE = false;
   static UpdateChannel UPDATE_CHANNEL = UpdateChannel.beta;

lib/data.dart

@@ -358,6 +358,7 @@ class SessionData {
     }
 
     ListTag poses = ct.get("pos")! as ListTag;
+    positions.clear();
     for (var pos in poses.value) {
       positions.add(await SmallPosition.fromNBT(pos.asCompoundTag()));
     }
@@ -461,6 +462,9 @@ class SessionData {
         // Convert this to a CompoundTag
         CompoundTag ct = await NbtIo.readFromStream(lst) as CompoundTag;
         _deserialize(ct);
+
+        IsReadOnly = true;
+        isWeb = true;
         return true;
       } else
         return false;

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.0.0-beta.19
+version: 1.0.0-beta.20
 
 environment:
   sdk: ^3.7.2