Hello DenisCL,
I think your suggestion is good to have, that's why I've created Pits item for it, so you may vote for it.
About the TreeListView - we'll consider what can be split in a way that will allow better minification.
The "Xap Minifier" is ready to go (it is testing phase) and will be published and officially announced in a week or two. Hope you'll try it once it is available and give us your valuable feedback.
Thank you.
Best wishes,
Miro Miroslavov
the Telerik team
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