refs #576, fixed livery filtering and editing

* fixed selector by stripping extra info before selecting
* correct reset of filter UI
* return livery object directly from form if already valid DB object

src/blackgui/editors/liveryform.cpp

@@ -53,6 +53,12 @@ namespace BlackGui
         CLivery CLiveryForm::getValue() const
         {
             CLivery livery(this->ui->livery_Selector->getLivery());
+            if (livery.hasCompleteData() && livery.hasValidDbKey())
+            {
+                // already complete data from selector
+                return livery;
+            }
+
             CAirlineIcaoCode airline(this->ui->editor_AirlineIcao->getValue());
             livery.setAirlineIcaoCode(airline);
             livery.setDescription(this->ui->le_Description->text());