shell command-line history should (maybe?) be per-shell not app-wide.

scenario:

i open blink, and mosh to a remote server. this is session 1.

i create a new blink shell by double-tapping, and mosh to another remote server. this is session 2.

if i then log out of the remote server in session 1 (eg with ^d), i am returned to that session's blink prompt. i then press cursor-up to retrieve the last command from the history, but i get the command from session 2 rather than that from session 1.

i think this is a little bit non-intuitive, and would expect the history to be per-shell, as this is how a conventional "screen" session (or desktop full of xterms/iterm2 sessions) works.

this is a low-priority issue.

No file, test, or entry point is named. Start by locating the shell history handling and compare how history is stored across the two Blink sessions; done means cursor-up after logging out in session 1 retrieves session 1's last command rather than session 2's.

Written by the indexing model from the issue text.