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
Merge branch 'master' of https://github.com/Joern-R/GoldenCheetah

Conflicts:
	src/CPPlot.cpp
	src/Pages.cpp