Release 0.5 started: SpringBoot instead of Jetty, Jersey etc.

Kai Reinhard

17.59.2021 c6e77f6fa462e292db5f693a33e7c483b5a6e19e

 borgbutler-server/src/main/java/de/micromata/borgbutler/server/user/SingleUserManager.java

@@ -48,7 +48,11 @@
        String dateFormat = userData.getDateFormat();
        this.singleUser.setDateFormat(dateFormat);
        String lang = Languages.asString(locale);
        preferences.put(USER_LOCAL_PREF_KEY, lang);
        if (lang != null) {
            preferences.put(USER_LOCAL_PREF_KEY, lang);
        } else {
            preferences.remove(USER_LOCAL_PREF_KEY);
        }
        try {
            preferences.flush();
        } catch (BackingStoreException ex) {