https://supportcenter.devexpress.com/ticket/details/t565161/why-might-all-editors-within-a-page-loose-values-when-the-aspxclientedit
Why might all editors within a page loose values when the ASPxClientEdit.ClearEditorsInContainer...
Oct 23, 2017 - Dear DevExpress Support, I have combobox populated and selected some value. When I open up popup Modal PopupControl and close it then it loo