When saving a wiki using WebDAV (as described in (easy) webdav saving à la Timimi) TiddlyWiki shows two small popups to tell me it started saving and when it is done that it is done. The two notifications are shown almost simultaneously (which is not a problem) but always overlap, as in the figure:
These look like normal Notifications (not a webdav specific thing): https://tiddlywiki.com/#Notifications
…and currently always seem to appear in the same position, overlaid on the top of any existing, and always persist for 3 seconds.
Having them stack vertically down the right edge, and have a configurable timeout would both be improvements imho.