* Provide a new scope property in ConfigurableClass with 4 possible
    values: WIKI, SPACE, ALL_SPACES and WIKI+ALL_SPACES. This property
replace the old boolean property configureGlobally which was standing
for WIKI (true) and SPACE (false).
  * Refactor a bit ConfigureClassMacros to use the new property
  * Refactor all existing ConfigureClass in xwiki-platform to use the
    new property
  * Provide translations for ConfigurableClass properties
  * Provide a new module with the migration components for
    ConfigurableClass
  * Put missing "creator" in the standard right so that it's not
    displayed in the extension rights