The "the Tor Browser loads the (startup page|Tails roadmap)" step is fragile

Originally created by @kytv on #10376 (Redmine)

Refactoring would allow retry_tor magic to be used for this step in case loading the page fails.

Feature Branch: test/10376-fix_startup-page_roadmap-test-is-fragile

Edited May 15, 2020 by kytv

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