In order to prevent clicking on the same button twice, when server-side click button is handled, the RadToolBar should be disabled or the clicked button. For that reason we are going to expose the following property: SingleClick = None/Button/ToolBar. In case that you want SingleClick property on RadToolBarButton, please leave us a comment with your feedback.
A placeholder feedback item for responsive toolbar based on customer feedback: * Adaptive (width-wise) toolbar sort of like Kendo's * Allow hiding text / hiding items on smaller devices