Download All Minecraft Versions (1 Click) in Launcher

Hello everyone!

I'm a fan of Minecraft like all of us, but i have a idea that will be great for me and other players.

I really like to play old versions of Minecraft, because it's more simple, more light to play in older computers e etc... And for this, i need to install all versions of Minecraft in launcher. 

It would be great if we could download all versions of Minecraft with just 1 click, as it would be very useful and save a lot of time, since minecraft has many versions in all these years of development. 

Even more interesting would be if at the time of download it was possible to choose via checkbox which versions we would like to download, or download all at once.

Thanks of your attention.