Make corner roundness not just save, but load, too

Author: PurelyAndy

Source/Frontend/UI/Components/Settings/SettingsGeneralForm.cs

@@ -54,6 +54,10 @@ public void LoadConfigIntoUI()
                 nmSwapEmuTimeout.Value = timeoutSeconds;
             else
                 nmSwapEmuTimeout.Value = 20;
+            if (int.TryParse(Params.ReadParam("CORNER_ROUNDNESS"), out int cornerRoundness))
+                nmCornerRoundness.Value = cornerRoundness;
+            else
+                nmCornerRoundness.Value = 5;
         }
 
         private void OpenOnlineWiki(object sender, EventArgs e)