🎉 Add czech lang

frontend/gulpfile.js

@@ -49,6 +49,7 @@ function readLocales() {
   const langs = ["ar", "ca", "de", "el", "en", "eu", "it", "es",
                  "fa", "fr", "he", "nb_NO", "pl", "pt_BR", "ro", "id",
                  "ru", "tr", "zh_CN", "zh_Hant", "hr", "gl", "pt_PT",
+                 "cs",
                  // this happens when file does not matches correct
                  // iso code for the language.
                  ["ja_jp", "jpn_JP"]

frontend/src/app/util/i18n.cljs

@@ -39,6 +39,7 @@
    {:label "Türkçe (community)" :value "tr"}
    {:label "Ελληνική γλώσσα (community)" :value "el"}
    {:label "Русский (community)" :value "ru"}
+   {:label "Český jazyk (community)" :value "cs"}
    {:label "עִבְרִית (community)" :value "he"}
    {:label "عربي/عربى (community)" :value "ar"}
    {:label "فارسی (community)" :value "fa"}