Don't change the icon when editing wxDataViewIconText cells in generic version.

wxDataViewIconTextRenderer changed the icon to that of the last item drawn by
it when editing a cell. Fix this by getting the original icon directly from
the model instead of from the last item.

Closes #14187.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71105 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/datavgen.cpp

@@ -1187,7 +1187,17 @@ bool wxDataViewIconTextRenderer::GetValueFromEditorCtrl( wxWindow *editor, wxVar
 {
     wxTextCtrl *text = (wxTextCtrl*) editor;
 
-    wxDataViewIconText iconText(text->GetValue(), m_value.GetIcon());
+    // The icon can't be edited so get its old value and reuse it.
+    wxVariant valueOld;
+    wxDataViewColumn* const col = GetOwner();
+    GetView()->GetModel()->GetValue(valueOld, m_item, col->GetModelColumn());
+
+    wxDataViewIconText iconText;
+    iconText << valueOld;
+
+    // But replace the text with the value entered by user.
+    iconText.SetText(text->GetValue());
+
     value << iconText;
     return true;
 }