PowerRename settings bugfix (#2796)

* PowerRename settings bugfix

* Changed visibility to enability of PowerRename_Toggle_MaxDispListNum

* Added unit tests and changed maximum value

src/core/Microsoft.PowerToys.Settings.UI.Lib/PowerRenameLocalProperties.cs

@@ -38,6 +38,10 @@ namespace Microsoft.PowerToys.Settings.UI.Lib
                 {
                     _maxSize = 0;
                 }
+                else
+                {
+                    _maxSize = value;
+                }
             }
         }