add filter to Android app similar to Windows

[mmally]

Is your feature request related to a problem? Please describe.
I prepared a shopping list on Windows and wanted to use it on my Android phone in Legoland.
It only showed 5 items (instead of 40), after some time I realized that I set a filter on Windows and it showed me only the filtered list.
I tried to remove the filter with a text editor directly in the bsx file, but that did not work for some reason (it was very tricky on such a small display and maybe I overlooked a character)
So my preparation was useless.

Describe the solution you'd like
having a filter dialog on Android similar to windows would be the best solution, but I understand that might be tricky to implement

Describe alternatives you've considered
if a filter dialog is not possible, either have a menu entry/button to enable/disable the filter