patch 8.1.2254: MS-Windows: mouse scroll wheel doesn't work in popup Commit: https://github.com/vim/vim/commit/0630bb6580237fe01db22a84885c10f12580f7af Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 4 22:52:12 2019 +0100 patch 8.1.2254: MS-Windows: mouse scroll wheel doesn't work in popup Problem: MS-Windows: mouse scroll wheel doesn't work in popup. Solution: Handle mouse wheel events separately. (closes https://github.com/vim/vim/issues/5138)