Bring back the tick boxes on the select version page

[fowlis]

Problem: I find that there are a handful of people who get confused when selecting the version to install BD to, since it's not very clear that you need to select the box to install to that version.

Suggested solution: Even though there aren't that many who have issues with this, I think bringing back the tick boxes to select the Discord version to install to would at least reduce, or completely stop the people asking about what to do on that step.

Screenshot from old BandagedBD installer. I can't provide a very good example of how I think it could look on the newer installer, since my graphic design skills are frankly abhorrent.

Not sure if this would mean the installer window would get cramped, but I'm sure increasing the width wouldn't cause issues.