Activated time filter is not reacting on changing "from"-date or "to"-date

Steps to reproduce in AS2 build 57:

- switch filter panel to be visible
- activate time filter (checkbox "use time filter")
- change "from"-date or "to"-date via the corresponding calendar

--> The message list is not updated to the new time period.

However, the message list updates to the new time period as soon as you deactivate and again activate the time filter.

Regards