#449 Migrate some properties to new settings

- Use new settings class for retrieving help header & backup configs
- Delete migrated configs from old settings

src/main/java/fr/xephi/authme/command/executable/authme/VersionCommand.java

@@ -3,7 +3,6 @@ package fr.xephi.authme.command.executable.authme;
 import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.command.CommandService;
 import fr.xephi.authme.command.ExecutableCommand;
-import fr.xephi.authme.settings.Settings;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
@@ -11,12 +10,15 @@ import org.bukkit.entity.Player;
 
 import java.util.List;
 
+import static fr.xephi.authme.settings.properties.PluginSettings.HELP_HEADER;
+
 public class VersionCommand implements ExecutableCommand {
 
     @Override
     public void executeCommand(CommandSender sender, List<String> arguments, CommandService commandService) {
         // Show some version info
-        sender.sendMessage(ChatColor.GOLD + "==========[ " + Settings.helpHeader + " ABOUT ]==========");
+        sender.sendMessage(ChatColor.GOLD + "==========[ " + commandService.getProperty(HELP_HEADER)
+            + " ABOUT ]==========");
         sender.sendMessage(ChatColor.GOLD + "Version: " + ChatColor.WHITE + AuthMe.getPluginName()
             + " v" + AuthMe.getPluginVersion() + ChatColor.GRAY + " (build: " + AuthMe.getPluginBuildNumber() + ")");
         sender.sendMessage(ChatColor.GOLD + "Developers:");