Remove quit_on_open option

config/nvim/file-tree.vim

@@ -16,9 +16,7 @@ lua << EOF
 EOF
 
 let g:nvim_tree_add_trailing = 1
-let g:nvim_tree_quit_on_open = 1
 let g:nvim_tree_indent_markers = 1
-" let g:nvim_tree_refresh_wait = 500
 let g:nvim_tree_show_icons = {
     \ 'git': 0,
     \ 'folders': 0,