1. add a new actions: close the bottom sheet on a swipe down

2. make the bottom sheet ui more distinguishable compared to the other UI elements on the screen
   Here is how it looks in the app - it is barely distinguishable from the other UI elements on the screen. We need to make it more prominent to ensure it is clear that this ui element is active on the screen.

Here is how the bottom sheet is shown in the old mobile app: