Run modernise on the project

This will be available in "go fix" within Go 1.26 but in the meantime:

go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...

ui/dialogs/settingsdialog.go

@@ -106,10 +106,7 @@ func (s *SettingsDialog) createGeneralTab(canSaveQueueToServer bool) *container.
 	startupPage = widget.NewSelect(pages, func(_ string) {
 		s.config.Application.StartupPage = backend.SupportedStartupPages[startupPage.SelectedIndex()]
 	})
-	initialIdx := slices.Index(backend.SupportedStartupPages, s.config.Application.StartupPage)
-	if initialIdx < 0 {
-		initialIdx = 0
-	}
+	initialIdx := max(slices.Index(backend.SupportedStartupPages, s.config.Application.StartupPage), 0)
 	startupPage.SetSelectedIndex(initialIdx)
 	if startupPage.Selected == "" {
 		startupPage.SetSelectedIndex(0)