Add Freebuff session restart option #524

Job	Run time
build-and-smoke-freebuff-windows	2m 33s
build-freebuff	1m 14s
e2e-agent-startup	2m 18s
e2e-version	1m 4s
e2e-help-command	1m 15s
e2e-code-edit	56s
e2e-startup	1m 19s
e2e-terminal-command	1m 12s
e2e-ads-behavior	1m 21s
e2e-slash-commands	51s
	14m 3s

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