Tuna: Adjust scrollable toggle dimens

Adjust width & padding for scrollable toggles so that
6 toggles fit evenly on screen. This probably needs to be done
for all devices.

Change-Id: I851f9f5766ac9670f406493b9109d57aad361621
Signed-off-by: Zaphod <mwilson@acesappraisal.com>