patch 8.1.1558: popup_menu() and popup_filter_menu() are not implemented yet commit https://github.com/vim/vim/commit/a730e55cc2d3045a79a340a5af1ad4a749058a32 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 16 19:05:31 2019 +0200 patch 8.1.1558: popup_menu() and popup_filter_menu() are not implemented yet Problem: Popup_menu() and popup_filter_menu() are not implemented yet. Solution: Implement the functions. Fix that centering didn't take the border and padding into account.

" vimrc for test_gui_init.vim

" Note that this flag must be added in the .vimrc file, before switching on
" syntax or filetype recognition (when the |gvimrc| file is sourced the system
" menu has already been loaded; the ":syntax on" and ":filetype on" commands
" load the menu too).
set guioptions+=M