tt connect history contains duplicates #1199
Description
In built-in Tarantool console duplicates are excluded from the history while in tt console they aren't. To reproduce the issue, open the console, type some command, e.g. box.info(), then type another command, e.g. box.slab.info(), then repeat the last command a few times (arrow-up + enter), then try to find the previous command - you'll have to do arrow-up as many times as you entered the last command, which is inconvenient.