Use SelectAll() instead of SetSelection(-1, -1).

The former is more clear and also shorter.

Closes #14701.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72566 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/grideditors.cpp

@@ -496,7 +496,7 @@ void wxGridCellTextEditor::DoBeginEdit(const wxString& startValue)
 {
     Text()->SetValue(startValue);
     Text()->SetInsertionPointEnd();
-    Text()->SetSelection(-1, -1);
+    Text()->SelectAll();
     Text()->SetFocus();
 }