Thank you for writing. There are two issues that lead to the behavior you describe:
- When you edit the RadListBoxElement in the drop down of RadComboBox in the VSB, the settings are saved in a file called ThemeName_Telerik_WinControls_UI_RadSizablePopupControl.xml. However there is a real RadSizablePopupControl which later in the saving process overwrites the previously generated file with the same name. We decided to remove the ability to edit the list box element because if you were able to edit it and then save it, your file would be overwritten, which means that no changes would have been applied.
- With our new theming mechanism we ran into the issue described above. This means that editing the list box inside RadComboBox is not an option, which in turn means that we have two choices, either create a correct list box theme with different Active and Selected states, or create a list box theme with identical Active and Selected states so that we don't break the previous combo box themes. Since the old combo box themes had no Selected and only an Active state this is the only option to at least partially avoiding breaking the old combo's themes. We decided to keep the combo theme and not the list box theme, because we estimated that RadComboBox is more often used than the stand-alone RadListBox.
Luckily you can easily modify the existing themes to your liking by simply editing the theme for RadListBox in Visual Style Builder and changing the Active and Selected states to something you deem appropriate.
Once we resolve the first issue we address the second one.
Please write again if you have other questions or if you need assistance with our controls.
All the best,
the Telerik team
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