The same property is available for MS TooltipService in WPF. 

Implement a mechanism that allows embedding font data when exporting documents.

ApplicationMenu do not have keyboard navigation - pressing arrows do not navigate thru the application menu items.
Declined as a duplicate of: https://feedback.telerik.com/wpf/1352753-ribbonview-applicationmenu-do-not-have-keyboard-navigation.

Add support for axis with multi-level categories
Declined as a duplicate of: https://feedback.telerik.com/wpf/1351027-chartview-add-support-for-axis-with-multi-level-categories

The Gridview Distinct Filters can't be reuse if the filtering panel is close.

When the filter panel is reopen selecting or deselecting distinct filter have no effect.

This is reproductible in telerik demo in any gridview with distinct filter.

the bug is present in browser and oob applications.

This item is declined because it is wrongly logged and the issue is duplicated with another feedback item. You may follow instead these feedback item which also provides a sample attached project for repairing such invalid files:

https://feedback.telerik.com/Project/143/Feedback/Details/170586-pdfviewer-handle-documents-containing-invalid-cross-reference-table-start-index

This item is declined because there are many PDF annotation types and we are going to create separate items for each type. You may follow some of the existing annotation feedback items listed below or create a new one which the Telerik team is going to approve. Here follows the list of the existing feedback items:
https://feedback.telerik.com/Project/143/Feedback/Details/167439-pdfviewer-support-for-annotations-of-type-stamp
https://feedback.telerik.com/Project/143/Feedback/Details/203379-pdfviewer-support-for-annotations-of-type-popup
https://feedback.telerik.com/Project/143/Feedback/Details/199351-pdfviewer-support-for-freetext-annotation-type
https://feedback.telerik.com/Project/143/Feedback/Details/149974-pdfviewer-highlight-annotation

Silverlight will be end of life in 2021. But if you look at at the currently supported browsers https://en.wikipedia.org/wiki/Microsoft_Silverlight#Desktop_computers you will see it is only running on Internet Explorer 11. All other browsers have canceled support for Silverlight.

Does it really makes sense to still support Silverlight?

I'm asking because of this: https://docs.telerik.com/devtools/wpf/xamlflix-step-by-step-guide/xamlflix-radbarcode. This is the WPF documentation for radBarcode but it effectivly is talking about Silverlight!

After selection autocomplete uses the data within TextSearchPath for display. We search many fields so this output is less than ideal. DisplayMemberPath or a SelectedItemTemplate would be better.

- When exporting Docx to Binary,  non-breaking spaces are being replaced by a normal space. 

It should be possible when user selects multiple cells on the current view with the CTRL key to return the list of these cells with the ScheduleView method.

More info here:
http://www.telerik.com/forums/select-multiple-days-with-ctrl-key

Rendering issues occur when using Hierarchical virtualization mode and bring into view several times. The Headers of some items appear over other Headers.

The feedback item is declined due to duplication with the one below:
http://feedback.telerik.com/Project/143/Feedback/Details/113680-treeview-rendering-issues-when-using-hierarchical-virtualization-mode-and-bring
Please follow it instead.  

When the PngBitmapEncoder uses source from a PNG file with opacity then the result image rendering is gray. The class is available in UI for Silverlight.

The application continues to use CPU even when the indeterminate ProgressBar is collapsed.

DECLINED: Duplicate with https://feedback.telerik.com/Project/143/Feedback/Details/113028-progressbar-collapsed-indeterminate-progressbar-uses-cpu

Add ability to change visibility of the information layer depends on the zoom range.

DECLINED: Duplicate with http://feedback.telerik.com/Project/143/Feedback/Details/113252-map-support-maplayer-zoomrange-on-informationlayer

My FindFullMatchIndex method returns -1 when an item is not found. Instead of selecting no items and leaving the scroll position where it's at like the default search text behavior; the combobox scrolls the list to the top and selects the first item in the list.

The Gauge control should allow to override the whole entire "Content" property of the tooltip like to the ItemToolTipOpening event of ChartArea.

Declined: Duplicate with http://feedback.telerik.com/Project/143/Feedback/Details/113231-gauge-add-ability-to-override-the-content-property-of-the-tooltip

DECLINED: Duplicate with http://feedback.telerik.com/Project/143/Feedback/Details/114177-htmlplaceholder-support-for-webbrowserbrush