Translate ":/Charts.XML" during import

... translate the names and units for Metrics and PMmetrics to the
locale of GC-preferences
... translate ONLY once if the default-chart is imported
Translate ":/-Layout.XML" metrics charts

... second part: 2nd part ("-Layout.XML") translation
... "Mapping Table generation" provided as a new LTMTool routine (to
avoid duplicate code)
... mapping to HomeWindow::restoreState(bool useDefault) for the LTM
Window type charts added
... metricUnit considered in getting the mapping texts for "unit"
ColumnChooser - Drag&Drop problem with special Characters and QT 4.6.8

... the .toUTF8() conversion used with QT5.3.x to handle special
characters (e.g. german Umlaute) in column chooser does not work for QT
4.8.6 (at least not for the Windows) - as a result (Drag&Drop from those
fields into Columns or Search Field is not working)
... following the approach other places, changed approach to
"serialization" of the info for "Drag&Drop" - so work independent on any
QT conversions (which seem to depend on other conditions - change over
time)
Merge pull request #981 from Joern-R/pull4

ColumnChooser - Drag&Drop problem with special Characters and QT 4.6.8
Merge pull request #979 from Joern-R/pull3

Translate ":/Charts.XML" during import
Merge remote-tracking branch 'upstream/master'