On smaller devices the notification filter listview may be longer than the
screen height, and pushes the "Apply" button out of sight.
Fix this by:
- Set the height of the listview to 0dp and its layout_weight to 1
- Set the layout_weight of the button to 0
This ensures the button always appears (because the listview height is 0dp)
and the listview then expands to fill any remaining space (because the
layout_weight is 1).
Fixes https://github.com/tuskyapp/Tusky/issues/2985
48ad2f9eee