#293 Translatable help - show translated description of child commands

- Show translated command descriptions when available
- Fix bug where localized command is registered on the parent each time

Thanks to @Maxetto

src/main/java/fr/xephi/authme/command/help/HelpMessagesService.java

@@ -67,6 +67,10 @@ public class HelpMessagesService implements Reloadable {
         return localCommand;
     }
 
+    public String getDescription(CommandDescription command) {
+        return getText(getCommandPath(command) + DESCRIPTION_SUFFIX, command::getDescription);
+    }
+
     public String getMessage(HelpMessage message) {
         return messageFileHandler.getMessage(message.getKey());
     }

src/main/java/fr/xephi/authme/command/help/HelpProvider.java

@@ -249,7 +249,7 @@ public class HelpProvider implements Reloadable {
         String parentCommandPath = String.join(" ", parentLabels);
         for (CommandDescription child : command.getChildren()) {
             lines.add(" /" + parentCommandPath + " " + child.getLabels().get(0)
-                + ChatColor.GRAY + ChatColor.ITALIC + ": " + child.getDescription());
+                + ChatColor.GRAY + ChatColor.ITALIC + ": " + helpMessagesService.getDescription(child));
         }
     }