SceneMode: Update scene selector

* Center it and fix redudant newlines on mode names
* Reimplement QR reader as "scene mode"

Change-Id: I910a660659d238a101c20426bc70745cd37fba68
Signed-off-by: Joey <jbevilacqua@shiftphones.com>
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
9 files changed