gui: Don't show settings for subcommand plugins
gui: Don't show settings for subcommand plugins

nafraf/spreads,DIYBookScanner/spreads,gareth8118/spreads,gareth8118/spreads,gareth8118/spreads,miloh/spreads,adongy/spreads,nafraf/spreads,adongy/spreads,miloh/spreads,nafraf/spreads,DIYBookScanner/spreads,adongy/spreads,miloh/spreads,DIYBookScanner/spreads