Comment 2 for bug 691864

Nah, no custom tooltips anymore but allow styling.
Have the standard ones translated and displayed with the associated shortcuts and thats it.

Tooltip attribute sounds good.
Naming convention should be in line with <ConfigKey> http://mixxx.org/wiki/doku.php/midi_controller_mapping_file_format#ui_midi_controls_and_names
This way we use these Key/Control names for Midi,Keyboard and Skins.

Some things to think on:
* That <Visual> and <Text> are some kind of exceptions
* That a button can have more than 1 <NumberStates>
* To display tooltips for the <Property> field inside a <TrackProperty> node

If the tooltips get some polish, we should separate them from the library tooltips
https://bugs.launchpad.net/mixxx/+bug/662540

It should be also possible to de/activate them from within the UI.