Comment 0 for bug 1227058

Currently .desktop files generated from the click manifest include a `X-Ubuntu-Touch=true` key, this key isn't indexed by existing libraries, therefore we'd like it changed to a category `Categories=X-UbuntuTouch;` (not that this key can contain list of categories, not just one).

As course we can keep both if there are other tools already looking for the X-Ubuntu-Touch key.