Tweak ride list accent bar

.. 2px wider at 7px .. better proportions

.. am slowly turning into Steve Jobs .. can
   someone pass the orange juice please.
CP Delta Compare Part 1 of 2

.. delta compare to use first date range as a baseline to
   compare other date ranges to.

.. only works for the bests curve in date range mode

.. in part 2 will add the model and also rides/intervals.
CP Delta Compare Part 2a of 2a/b

.. just quickly commit the changes for delta compare for
   comparing rides and intervals.

.. still need to fix up the model delta compare.
CP Delta Compare Part 2b of 2a/b

.. now completed to allow model comparisons too.
Translation enablement + some typos

... Further enablement for translation

... some typo in EN (seen during translation)

(cherry picked from commit 50b78cec0f2fae40f9a5974d98e145d9d9d55535)
Merge pull request #886 from Joern-R/pull

Translation enablement + some typos
Add missing )
Fix Veloclinic Model Variant Selection

.. it was broken in the PDModel refactor.

.. you can now select variants for the aerobic
   (slowtwtich) component.
Merge branch 'master' of github.com:/GoldenCheetah/GoldenCheetah
Fix LTM Plot Legend Colors in Compare

.. they were always black which wasn't good on a
   dark background !
Set Default W' in Athlete Zones

.. of 20kJ

Fixes #882
Add Ae-An Stress Chart to default layout

.. using An and Ae TISS
Add ScatterPlot to the default ride layout

.. its ready for prime time

.. but needs the metric/imperial bugs fixed !
Appearances config to hide ride scrollbar

.. on Non-Mac platforms. It might be just me but the scrollbar
   just looks horrible.

.. should look at a custom scrollbar that 'appears' when it
   is needed (when scrolling or on hover?)
Style the ridelist scrollbar on non-mac

.. to be less obtrusive.

.. lets see if we can improve on this ?
Less Intrusive Sidebar Scrollers

.. but still want an 'on hover' scrollbar
   for the ride list.
Oh. Only Linux for Scrollbars

.. Windows looks HORRIBLE.
Allow Heading to be hidden in ride list

.. cleaning up the ride list.
Fix HrPw marker colors
Fix x axis on CP plot compare

.. when changing ride series from e.g Power to W/KG