Possibility to work on multiple operations (rename, change category, change account)

New database version (2) :
		fix_cost for categories
		virtual account

src/view/wxUI.cpp

@@ -1,5 +1,5 @@
 /*
-  Copyright 2010 Grégory Soutadé
+  Copyright 2010-2011 Grégory Soutadé
 
   This file is part of KissCount.
 
@@ -199,6 +199,7 @@ void wxUI::ShowPanel(KissPanel* panel)
 {
     wxShowEvent event;
     int i;
+    User* user = _kiss->GetUser();
 
     if (!panel) return;
 
@@ -210,6 +211,7 @@ void wxUI::ShowPanel(KissPanel* panel)
 
     if (_needReload)
     {
+	user->InvalidateOperations();
 	for(i=0; i<(int)_panels.size(); i++)
 	    if (_panels[i] == panel) break;
 	LoadPanels();