vim-patch:8.2.1513: cannot interrupt shell used for filename expansion

Problem:    Cannot interrupt shell used for filename expansion. (Dominique
            Pellé)
Solution:   Do set tmode in mch_delay(). (closes vim/vim#6770)
0981c8729e

Neovim does not run settmode() in os_delay() so this patch is mostly N/A.
Do not port Vim's flags (ie. MCH_DELAY_SETTMODE) for mch_delay().

src/nvim/if_cscope.c

@@ -1865,7 +1865,7 @@ static void cs_release_csp(size_t i, bool freefnpp)
             alive = false;             // cscope process no longer exists
             break;
           }
-          os_delay(50L, false);           // sleep 50ms
+          os_delay(50L, false);  // sleep 50 ms
         }
       }
       if (alive)