Added settings for seasons and number series. Added static method

ComboData::createComboData for easier combo bindings.

commodity/commodityform.cpp

@@ -30,11 +30,6 @@ CommodityForm::~CommodityForm()
 
 void CommodityForm::registerCombos()
 {
-    QList<ComboData> ct;
-    Service<CommodityTypeData> cts;
-    foreach (QSharedPointer<CommodityTypeData> ctd , cts.all()) {
-        ComboData cd(ctd);
-        ct << cd;
-    }
-    registerBinding(ui->type,ct);
+    Service<CommodityTypeData> srvComTypes;
+    registerBinding(ui->type, ComboData::createComboData(srvComTypes.all()));
 }