Right now the availableFormats data is presented in ST by showing, for each
skeleton in the locale's data or inherited, the pattern for that skeleton and an
example for the pattern. This does not convey that a given availableFormats
entry can handle multiple skeleton requests. It also does not provide a way to
add entries for new skeletons that may be required in a given locale.
A more useful presentation might show, for a standard set of skeletons (plus any
other inherited or locale-specific skeletons), how each of those seketons is
handled by the current set of availableFormats data, and provide a mechanism for
changing either the skeleton or pattern for existing entries, and adding entries
for new skeletons as required.