patch 8.2.1768: cannot use the help menu from a terminal window

Problem:    Cannot use the help menu from a terminal window.
Solution:   Add ":tlnoremenu" commands. (Yee Cheng Chin, closes #7023)
diff --git a/runtime/menu.vim b/runtime/menu.vim
index 60e956c..e176524 100644
--- a/runtime/menu.vim
+++ b/runtime/menu.vim
@@ -2,7 +2,7 @@
 " You can also use this as a start for your own set of menus.
 "
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2020 Mar 29
+" Last Change:	2020 Sep 28
 
 " Note that ":an" (short for ":anoremenu") is often used to make a menu work
 " in all modes and avoid side effects from mappings defined by the user.
@@ -89,6 +89,21 @@
 an 9999.80 &Help.&Version		:version<CR>
 an 9999.90 &Help.&About			:intro<CR>
 
+if exists(':tlmenu')
+  tlnoremenu 9999.10 &Help.&Overview<Tab><F1>		<C-W>:help<CR>
+  tlnoremenu 9999.20 &Help.&User\ Manual		<C-W>:help usr_toc<CR>
+  tlnoremenu 9999.30 &Help.&How-To\ Links		<C-W>:help how-to<CR>
+  tlnoremenu <silent> 9999.40 &Help.&Find\.\.\.		<C-W>:call <SID>Helpfind()<CR>
+  tlnoremenu 9999.45 &Help.-sep1-			<Nop>
+  tlnoremenu 9999.50 &Help.&Credits			<C-W>:help credits<CR>
+  tlnoremenu 9999.60 &Help.Co&pying			<C-W>:help copying<CR>
+  tlnoremenu 9999.70 &Help.&Sponsor/Register		<C-W>:help sponsor<CR>
+  tlnoremenu 9999.70 &Help.O&rphans			<C-W>:help kcc<CR>
+  tlnoremenu 9999.75 &Help.-sep2-			<Nop>
+  tlnoremenu 9999.80 &Help.&Version			<C-W>:version<CR>
+  tlnoremenu 9999.90 &Help.&About			<C-W>:intro<CR>
+endif
+
 fun! s:Helpfind()
   if !exists("g:menutrans_help_dialog")
     let g:menutrans_help_dialog = "Enter a command or word to find help on:\n\nPrepend i_ for Input mode commands (e.g.: i_CTRL-X)\nPrepend c_ for command-line editing commands (e.g.: c_<Del>)\nPrepend ' for an option name (e.g.: 'shiftwidth')"