Task jump-list items for modern apps require special handling.
First of all they don't provide icon directly.
Icon location is stored in `PKEY_AppUserModel_DestListLogoUri` property.
And then has to be resolved for given application package.
Next, context menu of provided `IShellLink` item doesn't seem to be able
to start actual link target.
Thus we need to obtain context menu of target item.
Fixes#375.
