Feature Request: Filtering option

[yhliew]

I have been using phoenix slides for many years, and thanks for great app you have created.
One feature which I find useful (based on other app) but missing from phoenix slides is doing basic filtering of photo listing, eg. having a filter text box to key in regex and filter photos list based on filename. eg. I have hundreds of phots in a folder, but I just want to show the photos file name matching "2001-*".
I believe this can be implemented as the app already has a function to scan the folder and search for photo files.
Hope this can be implemented. Thanks a lot in advance.