Majid kamali

Results 4 issues of Majid kamali

When I use append-to-body property for my Treeselect and use Treeselect in dialog "rtl" mode does not work I see this problem in the demo as well [Treeselect org](https://vue-treeselect.js.org/)

hi I need to add GROUP_CONCAT how can i use and how can I use case

Documentation not enough? plz make Tutorial