* fix: lock buttons at dialog bottom
The previous implementation appended the buttons to the RecyclerView programmatically
this disabled the scroll and pushed the buttons outside the visible dialog area
if too there were too many playlists.
To fix this now the XML defines a fixed location for the buttons, enabling
the scroll of the RecyclerView and preventing the buttons to become unreachable
* feat: improve playlist chooser dialog UI
Implement it in the XML layout and not programmatically.
* fix: detached listeners from XML layout
* fix: missing dialog title
