Extend the timespan of downloading messages #6
Description
At the moment it is only possible to shorten the timespan of downloading messages, this means deleting messages older than x days. The saving timespan must be greater or equal to the (initial) download timespan in order to achieve consistency.
But after the inital download the app ignores prolonging the timespan, you have to first remove the newsgroup from the subscription list, then prolong the timespan of downloading messages in the server settings, then subscribe to the newsgroup again. This needs to be fixed (although this will not easy, as I need to somehow map the messages together by their message id).