Automatic messageId import from earlier app instances.

[jeyemwey]

Right now, the host needs to load the Telegram messageIds (stored in botUsers) manually by typing fs.readFileSync("loggedInUsers.log", "utf-8").split("\n").forEach((i)=>{botUsers.push(i)}); into the application console.

This is counter-intuitive for the host and the application should be able to do it by itself.