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)

src/testdir/test_gui.vim

@@ -739,6 +739,9 @@ func Test_menu()
 
   " Check deleting menu doesn't cause trouble.
   aunmenu Help
+  if exists(':tlmenu')
+    tlunmenu Help
+  endif
   call assert_fails('menu Help', 'E329:')
 endfunc
 

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1768,
 /**/
     1767,
 /**/