Translate ":/Charts.XML" during import

... a little more explanation here, since the changes in the files are very "optimized":

... LTMTool: - extracted the "RideMetrics" definitions for all the PM settings into an own static routine (which is used as well by the orginal LTMTool (where the code comes from) , but also allows to re-use the MetricsDetail table for PMmetrics for translation of the PMmetrics (used on LTMSettings for now)
 
... LTMSettings: added that (only) for the DEFAULT "Charts.XML" the translation for field names and units takes place. It currently maps the standard metrics and the PM related metrics, but not measures, or estimates

I have tested in English, German and French - texts available are translated - otherwise EN is still the default. Since the translated settings are stored in the local CHARTS.XML the change is persistent. For users running GC in multiple languages this could be confusing, since with the further changes of GC language, the copied CHARTS.XML is not touched any more. 

What's not translated by this way are any LTMSettings in the "xxx-Layout.XML" charts.

Please decide if you want to add to 3.1 still (I know it's pretty late - and RC2 is alreday out) - we can also push to 3.11 or further.