The is already a ContextMenuCommand present on the FrameworkElement, which would be executed by pressing the "Applications" key on the keyboard. The current implementation is missing a line where this command is copied after reading it from xaml, so it is never available.

h4. Steps to Reproduce
Assign any command to the ContextMenuCommand of any FrameworkElement in xaml, it will never be executed.

h4. Additional Information
Fix in branch:
https://github.com/MediaPortal/MediaPortal-2/tree/FIX_ContextMenuCommand_not_working