So, here's another update.
New features:
- Different display style (font) for collections and "normal" items
- Indicator of how many collections an item is contained in
- Long-click on an item to see which collections it is contained in
- Preferences are saved across restarts
- Search filters are reset after changing the current collection
- Search filters now consider author names as well! (So a filter of "oyl" will still yield "The Adventures of Sherlock Holmes"). This is a feature, not a bug
- ... and some bugfixes under the hood
Note: I have carefully considered all the remarks and requests that were posted in this thread. Many of the requests are addressed by this update; some aren't. For the ones which weren't addressed: rest assured that there is a good reason for not implementing them
