change yes/no by emptyParameters (refs #4121)
Added static method FormatCollection::getDisplayValue() (refs #4176)

Also:
- changed Report class to use FormatCollection::getDisplayValue()
- changed NormalAttribute::getTextualValue() to use
  FormatCollection::getDisplayValue()
- corrected PU tests
- removed private NormalAttribute::getTextualValue.+() methods
Merge pull request #958 from Eric-Brison/3.2-A4121

change yes/no by emptyParameters (closes #4121)
Merge pull request #959 from eguaj/3.2-A4176

Added static method FormatCollection::getDisplayValue() (closes #4176)
add DocEnum methods to disable and translate enums items (refs #4171)
add action FDL:GETENUMITEMS , FDL:MODENUMITEMS
use disable in getenumitems (refs #4171)
add parentLabel (refs #4171)
New edit enum interface (refs #4175)
Correct add bug and order (refs #4175)
Change enum widget css (refs #4175)
add i18n (refs #4175)
add parent in list enum (refs #4175)
add help message in french (refs #4175)
Add option for save and reload button at bottom (refs #4175)
Add translation for widget (refs #4175)
Add tootips (refs #4175)
adjust css for input edtable (refs #4175)
Correct tipsy bug and add translation (refs #4175)