update api to use singular for themes and shorcuts
update api to use singular for themes and shorcuts

Mignet/EpicEditor,OscarGodson/EpicEditor,cesarmarinhorj/EpicEditor,codePile-Commit/EpicEditor,chenhengjie123/EpicEditor,cesarmarinhorj/EpicEditor,hacksalot/EpicEditor,devlinjd/EpicEditor,OscarGodson/EpicEditor,Mignet/EpicEditor,chenhengjie123/EpicEditor,hacksalot/EpicEditor,devlinjd/EpicEditor,codePile-Commit/EpicEditor