Thank you for the feedback. All of the issues you've listed are reproducible and are bugs of the plug-in itself, which is a 3rd party software and not maintained by us. The best we can do at this time is upgrade the plug-in to its latest 1.2.2 version where some of these problems are addressed, namely the dismiss of the notifications. We would make this upgrade for the upcoming release at the beginning of May.
As for the rest of the problems that are still not fixed, there is nothing we can do on our end, so please comment about them on the plug-in github page directly.
All the best,
the Telerik team
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