Add ascending/descending operation order in preferences

Remove default_preferences table
Force date by default in SearchPanel
Update TODO !!
Add a generic UpdatePreference instead of SetLanguage, SetXXX into Database

src/view/PreferencesPanel.h

@@ -48,6 +48,7 @@ class PreferencesPanel: public wxPanel
   void OnCategoryModified(wxGridEvent& event);
   void OnChangeName(wxCommandEvent& event);
   void OnChangePassword(wxCommandEvent& event);
+  void OnOperationOrderChange(wxCommandEvent& event);
   void OnLanguageChange(wxCommandEvent& event);
   void OnShow(wxShowEvent& event);
   void OnKillMe(wxCommandEvent& event);
@@ -59,10 +60,12 @@ class PreferencesPanel: public wxPanel
   wxGrid* _categoriesGrid;
   wxTextCtrl* _name;
   wxBitmapComboBox* _language;
+  wxComboBox* _operationOrder;
 
   void InitAccounts(User* user);
   void InitCategories(User* user);
   void InitLanguage(User* user);
+  void InitOperationOrder(User* user);
 
   DECLARE_EVENT_TABLE();
 };