change {MAIN_MENU}

[tjonger]

i found the right pages.

Main menu: (\gui\themes\omega_original\client)
- main_menu_email_accounts(.tpl)
- main_menu_ftp_accounts(.tpl)
- main_menu_general_information(.tpl)
- main_menu_manage_domains(.tpl)
- main_menu_manage_sql(.tpl)
- main_menu_statistics(.tpl)
- main_menu_ticket_system(.tpl)
- main_menu_webtools(.tpl)

Side menu: (\gui\themes\omega_original\client)
- menu_ftp_accounts(.tpl)
- menu_general_information(.tpl)
- menu_manage_domains(.tpl)
- menu_manage_sql(.tpl)
- menu_email_accounts(.tpl)
- menu_statistics(.tpl)
- menu_ticket_system(.tpl)
- menu_webtools(.tpl)