Model Estimate Fixups

.. don't rely upon ZDATA metadata, instead we add
   a new 'present' field that contains the Data meta value

.. navigator defaults columns when they're all messed up

.. summary isn't so noisy when providing progress updates
Use w/kg units always, not wpk

.. and also allow lrbalance in data filter
Apply stylesheet to ride metadata

.. and tidy up a few nits here and there
Translation Enablement

... tr()
... Adding to Special Fields (allow translation of "Details->Extra"
fields
Show Heat - sometimes wrong scale

... set YAxis scale
... set more specific YAxis texts (Percent of Best / Heat)
... Adjust Unit in Heat Hover
Merge pull request #925 from Joern-R/pull1

Translation Enablement
Merge pull request #926 from Joern-R/pull2

Show Heat - sometimes wrong scale
CPLOTGRID used for Metadata Borders

.. starting to see a pattern now of which colors are
   meaningful .. should look at rationalising this
   in v3.2
Fixup QTextEdit stylesheet

.. different on metadata to everywhere else !
Merge Upstream/Master