Remove duration from the status methods

We always set 10 seconds anyhow, might as well do that without repeating ourselfs.

commands/msgview/save.go

@@ -128,10 +128,10 @@ func (Save) Execute(aerc *widgets.Aerc, args []string) error {
 	go func() {
 		err := <-ch
 		if err != nil {
-			aerc.PushError(fmt.Sprintf("Save failed: %v", err), 10*time.Second)
+			aerc.PushError(fmt.Sprintf("Save failed: %v", err))
 			return
 		}
-		aerc.PushStatus("Saved to "+path, 10*time.Second)
+		aerc.PushStatus("Saved to " + path)
 	}()
 	return nil
 }