first of all, thank you for creating such a useful app.
the UI is quite intuitive, but because of a few peculiar behaviours of the app, it took me some time to figure out some of the operations.
one area which i hope you will improve on is the "Filter". when one uses the "filter" to search for a collection, the collections that fit the filter condition will be displayed. when one select a particular collection, the name of the collection will appear in the "current collection" box. but the contents of the collection will not show. this is because the "filter" condition still remains. but because the "filter" box is empty the user may be confused and do not know the reason why the contents are not shown. only when one taps on the "filter" box will one see the filter word. and only by deleting the word will the contents in the collection be displayed.
could you fix this, so that when a collection is selected, the "filter" box will be cleared and the contents will be displayed.