Fixed Issue #2348 (WIP) - Initial iteration of added logic for send user to template app gallery

As per the comment thread for this issue between @SteveALee and I, this is my current MVP for this. I intend on turning this function into a more elegant and dynamic "preview window" like menu feature in the near future. Any feedback or guidance on implementing this would be greatly appreciated.
This doesn't look like the "official" templates list, where did this URL come from?