Added: some numeric text inputs now support expressions (e.g. (23+15)*1.5). -...

Added: some numeric text inputs now support expressions (e.g. (23+15)*1.5). - inspired by https://www.doomworld.com/vb/doom-editing/91089-gzdoombuilder-patch-expression-evaluation-for-sector-heights/
Fixed, Game Configurations window: fixed a crash when switching to a game engine without the file path using the "Engine" drop-down.