### Describe the bug ReadOnly `TextBox` can clear content by `hc:InfoElement.ShowClearButton="True"` ### Steps to reproduce the bug `hc:InfoElement.ShowClearButton="True"` ### Expected behavior _No response_ ### Screenshots _No response_ ### NuGet package version HandyControl 3.4.0 ### IDE Visual Studio 2022 ### Framework type .Net 6.0 ### Windows version Windows 11 (22000) ### Additional context _No response_