ssh: Don't erase the connection input on escape key (#19550)

This PR changes the behavior of pressing the `Esc` key on the connection
input. Now, if you hit it, the address inserted into the input won't be
erased. Effectively, escape now only cancels the connection process
instead of doing both (clearing the input _and_ cancelling the
connection).

Release Notes:

- N/A

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>