Fix conflict with Qwtplot3d

The struct Appearance conflicts with a class
in the QWT3D namespace. So renamed it. Fixes
a compile time error.
UI Nits: BlankState cosmetics

Just wordwrap the labels gives more screen estate to
the right side image making it less likely to be out
of proportion with the text size.

Also changed disc to disk in one of the narrative
texts. Maybe its a 'British English' thing tho ;)
Added CNUMOFCFGCOLORS macro to define the number of configurable metric colors are available
Added macro entries for Load, TSS and BikeScore
Added use of CNUMOFCFGCOLORS macro in ColorList and DefaultColorList arrays
Added Load, TSS and BikeScore support in setupColors()
Added support for configurable colors for Load, TSS and BikeScore
Merge pull request #434 from jjofre/master

Remove hard-coded colors for Load, TSS and BikeScore