Added ukrainian translation by Matronium and worked around firefox bu…

…g related to proxies

scripts/i18n.js

@@ -2,18 +2,18 @@ const langRequested = window.location.search.substring(1).split('&')[0]
 const langEnforce = langRequested ? [langRequested] : null
 
 export async function loadL10n() {
-    const langs = ['cs', 'de', 'en', 'es', 'ko', 'pt', 'zhcn', 'zhtw', 'fr']
-    const l10nDataList = await Promise.all([
-        ...langs.map(lang =>
+    const langs = ['cs', 'de', 'en', 'es', 'ko', 'pt', 'zhcn', 'zhtw', 'fr', 'uk']
+    const [l10nDataList, i18nBuilderMod] = await Promise.all([
+        Promise.all(langs.map(lang =>
             fetch(`./scripts/l10n/${lang}.json`)
                 .then(res => res.json())
                 .catch(err => {
                     throw Error(`Fail to load ${lang} lang data.\n\n${err.message}`)
                 })
-        ),
+        )),
         import("https://unpkg.com/@aurium/[email protected]") // parallel loading
     ])
-    const i18nBuilder = l10nDataList.pop().default
+    const i18nBuilder = i18nBuilderMod.default
     const l10nData = {}
     langs.forEach((lang, i) => l10nData[lang] = l10nDataList[i])
     window.i18n = i18nBuilder(l10nData, langEnforce)