Tweaks to maintab

Align statistics tab labels as per infotab.

Amend helper function to show degree symbol for temp measurements.

Change order of member initialisation list to match order of decl
(ProfileGraphicsView::ProfileGraphicsView)

Signed-off-by: Amit Chaudhuri <amit.k.chaudhuri@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>