"Engine" groupbox and "Add Engine" tab are redundant

[duganchen]

It is redundant to have both "Engine" group box on the "Launch "Wad" tab, and a separate "Engine Setup" tab.

You need to redesign the UX to consolidate those two.

[Hypnotoad90]

I was planning to extend the Engine Setup tab in future, but I believe Engine Setup allows you to handle extra cases, for instance when you have multiple beta versions of a single doom engine.

[yum13241]

It also allows you to rename engines for example.