Ability to upload files to Azure Blob Storage

CustomUploadHandler-AzureUpload demo is added in our SDK:
https://github.com/telerik/xaml-sdk/tree/master/Upload/CustomUploadHandler-AzureUpload 

Port the current SL implementation of MediaPlayer to WPF.

Changed the status to Completed: We created a MediaPlayer SDK example which can be used in WPF. 
https://github.com/telerik/xaml-sdk/tree/master/Common

Add DataBinding Supoort for Contextual Groups / Tabs

You could repair the invalid file using the project from the attachment.

When Tab key is pressed inside of the drop down portion of the ComboBox the next control to be focused.

Available in the 2016 Q1 Release: Added IsDropDownTabNavigationEnabled property which provides an option to disable the Tab navigation in the dropdown of non editable ComboBox.

Users want to be able to resize columns of RadPivotGrid at runtime, similar to RadGridView.

It would be nice if RadPdf Viewer would support page rotation.

Allow users to expand properties of a complex type in order to reveal the list of that type's properties.

The feature will be available in R1 2019, scheduled for the mid of January 2019. 

Currently it is not possible to show labels in the cells of the HeatMap. It would be helpful if there is a way (such as a ShowLabels property) to specify whether labels with values should appear inside the cells or not.

Available in Q2 2015 Release.

The regular ComboBox goes through all of the starting with the same letter items when pressing the same key multiple times. RadComboBox currently always highlights the first one.
In addition, the case where starting to type couple letters, will select the matched item with StartsWith

Should not allow editing the value, neither with the buttons or arrow keys, nor with typing inside the TextBox. But should be able to be focused and for example copying text from it.

Support easy customization of screen tip duration.

If the Mask property of the control is set to Mask="" the RadMaskedNumericInput should allow users to input minus sign before entering any other symbol.
Currently users are not allowed to visualize only minus sign in the control in NoMask scenarios.

Will be available in Q1 2016 Release.

Add the ability, while holding down a modifier key (for instance ALT which triggers the KeyServices) and pressing the AccessText key at the same time, to execute the action associated with the element.

Available in R1 2017 Release
Please note that is it working only for KeyDown ActivationModes, not in the default KeyUp.

typically users consider keys like Shift,Ctrl,ALT to be a single key even though they are on the keyboard left and right.

It will be nice to expose public API to allow custom touch handling.

Completed:
With 2016 Q1 version, a static TouchManager has been introduced allowing handling of touch events, gestures, and adding custom touch gestures.