Added ignore for unexpected dispose errors

Moonlight/Shared/Components/Xterm/Terminal.razor

@@ -38,9 +38,17 @@
     }
 
     public async void Dispose()
+    {
+        try
         {
             await Xterm.DisposeAsync();
         }
+        catch (Exception)
+        {
+            // ignore dispose errors. They occur when the tab closes unexpectedly
+            // so we can ignore them
+        }
+    }
 
     private async void OnFirstRender()
     {