Add ImportPanel

Throw exception when category/account are not found in User
Fix a bug in GrisbiImportEngine with QDate::fromString
Try to search an account also with its name
Remove categories number limit (only used for pie color)

src/view/wxUI.cpp

@@ -22,9 +22,8 @@
 #include "AccountPanel.hpp"
 #include "SearchPanel.hpp"
 #include "PreferencesPanel.hpp"
-//#include "UsersDialog.hpp"
 #include "StatsPanel.hpp"
-//#include "ImportPanel.hpp"
+#include "ImportPanel.hpp"
 #include "ExportPanel.hpp"
 
 #include "wxUI.hpp"
@@ -168,7 +167,7 @@ void wxUI::InitPanels()
     ADD_PANEL(StatsPanel);
     ADD_PANEL(SearchPanel);
     ADD_PANEL(PreferencesPanel);
-    // ADD_PANEL(ImportPanel, 4);
+    ADD_PANEL(ImportPanel);
     ADD_PANEL(ExportPanel);
 }