Updater

[trimechee]

Hello, to know if there is a new version of Iptvnator, we must frequently visit the github page of Iptvnator and sometimes we can forget, it will be great to add option to have a warning that there is a new version of Iptvnator and include the link of the Iptvnator releases page for more simplicity and speed, or include a manual update button which will automatically open the web browser to the releases page if there is a new version, thank you very much !