move colorclass config to use elm infra, redo cc dialog to use new editor

move colorclass config to use elm infra, redo cc dialog to use new editor

this will allow all colorclasses present in the current theme to be edited
instead of only the hardcoded ones in the module. it will also require
completely new translations, for which translators will need to read the edc
files of the default theme (cleverly located in another repo) and provide
translations to the _translate() callback in the theme module

the editor currently lacks indicators for active/type on the colorclass
list, but this can be added in time. meanwhile, a large amount of code is
no longer duplicated or maintained in this repo