fix: improve git commit message via nvr

Switch to the BufUnload event for reopening LazyGit window, so that the
user can switch windows before submitting his commit message.

ftplugin/gitcommit.vim

@@ -1,7 +1,7 @@
 if exists("g:lazygit_opened") && g:lazygit_opened && g:lazygit_use_neovim_remote && executable("nvr")
     augroup lazygit_neovim_remote
       autocmd!
-      autocmd WinLeave <buffer> :LazyGit
-      autocmd WinLeave <buffer> :let g:lazygit_opened=0
+      autocmd BufUnload <buffer> :lua local root = require('lazygit').project_root_dir(); vim.schedule(function() require('lazygit').lazygit(root) end)
+      autocmd BufUnload <buffer> :let g:lazygit_opened=0
     augroup END
 end

lua/lazygit.lua

@@ -224,4 +224,9 @@ local function lazygitconfig()
   end
 end
 
-return { lazygit = lazygit, lazygitfilter = lazygitfilter, lazygitconfig = lazygitconfig }
+return {
+  lazygit = lazygit,
+  lazygitfilter = lazygitfilter,
+  lazygitconfig = lazygitconfig,
+  project_root_dir = project_root_dir,
+}