settings: allow scroll in LED settings's color dialog

This is useful in mdpi devices and landscape mode, when the current layout rebased the dialog height

Change-Id: I7f9cd936076d3409e78a8f6b9a24b180a36a2bc8
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Settings: cleanup new profiles UI

* cleanup old code
* for configuring profiles, add options to modify triggers and remove
the profile
* remove separate activity
* don't hardcode padding pixel sizes

Change-Id: I6b1d05c9f918714249411006c7562496e2a7539e
Signed-off-by: Roman Birg <roman@cyngn.com>