Refactor guest_user feature
Refactor explore_page feature
Added some tweaks
Refactored preview feature
Fix download permission spec, add cider-ci tasks
Refactor welcome page spec
reset Capybara's session before sign in action
Rewrite graph visualization feature to specs
handle new windows properly
fix visualization styling responsible for failing spec
Revert "reset Capybara's session before sign in action"

This reverts commit 1dcfe8b9bc6fbd285b01e8e8cddfd1b1413121e0.
always visit root_path before sign in