add close command at global level

commands/msgview/close.go

@@ -1,30 +0,0 @@
-package msgview
-
-import (
-	"errors"
-
-	"git.sr.ht/~sircmpwn/aerc/widgets"
-)
-
-type Close struct{}
-
-func init() {
-	register(Close{})
-}
-
-func (_ Close) Aliases() []string {
-	return []string{"close"}
-}
-
-func (_ Close) Complete(aerc *widgets.Aerc, args []string) []string {
-	return nil
-}
-
-func (_ Close) Execute(aerc *widgets.Aerc, args []string) error {
-	if len(args) != 1 {
-		return errors.New("Usage: close")
-	}
-	mv, _ := aerc.SelectedTab().(*widgets.MessageViewer)
-	aerc.RemoveTab(mv)
-	return nil
-}