A DataStorage that can be used for both in Windows 8.1 and Windows Phone 8.1 apps.

A control that is able to display PDF files natively in Universal App

Declined: Currently UWP does not have an ImageEditor control. On the following link you can find a feature request where you can vote for introducing such a control and track its status: https://feedback.telerik.com/Project/167/Feedback/Details/201118-new-control-image-editor-port-to-uwp

After multiple control reload the memory is not released.

Declined: Currently UWP does not have an ImageEditor control. On the following link you can find a feature request where you can vote for introducing such a control and track its status: https://feedback.telerik.com/Project/167/Feedback/Details/201118-new-control-image-editor-port-to-uwp

ListView: Expose setter for SelectedItem property and implement it, so that setting this property applies the corresponding style to the selected item.

Declined: The SelectedItem property has public setter. Setting it makes the style be applied as expected on the item.

I think that will be a very good feature. Just create a chart control available over this platform. A chart control like UI for Silverlight will be a fantastic one.

Port the Windows Phone ImageEditor to WinRT.

http://www.telerik.com/products/windows-phone/overview/all-controls/image-editor.aspx

A control that is able to display PDF files natively in Universal App 

Port RadGauge to Windows Universal

Universal Window component.

Universal rich text editor.

Universal color picker.

The one that's already in win8 phone and UI for WPF. 
Please please

Hi,
Please make datastorage for UWP.

Thanks

Port Image editor from Win 8.1 supporting different form factors.

Allow UWP to use Gantt charts similar if not better than the ones used in WPF