Closes#7759
While opening a new SSH project if we are reusing an existing window,
i.e. drop the existing workspace and create a new one, then before
dropping it, we should remove `session_id` from that workspace's
serialized entry. That way:
1. Upon closing (cmd-w) this remote workspace (which also clears
`session_id` for this), and then quitting. No workspace with that
`session_id` is found, and it starts fresh.
2. Upon directly quitting (cmd-q) this remote workspace, only this
workspace exists in db (among two of them) with that `session_id`, and
it restores correctly.
Release Notes:
- Fixed an issue while closing remote workspace restores last local
workspace on startup.
11ac83f3d4