LTM Popup - last changes

... show also METRIC_BEST if such a curve is available
... ignore METRICs which are not ride related (Estimates, Measures) in
the Ride Table
... add Text if such a Metric was ignored (so that User do not assume
this to be a bug)
Merge pull request #943 from Joern-R/pull1

LTM Popup - a few more improvements