Fixes 2 bugs:

1. Dory bug: When Firefox updated itself, Tab Tosser would open its onboarding page because it thought it was being installed for the first time. Now only opens onboard when new version of Tab Tosser is installed.

2. Jimmy Buffett bug: In some circumstances, Tab Tosser could get stuck in “vacation mode”. Now dutifully returns to tossing tabs after user returns from vacation and has had a few days to evaluate their tabs.

- All tossed tabs now recoverable for 30 days
- Close tab options are now: manually, after 1 day, after 1 week, after 1 month
- Added troubleshooting screen accessible from extension settings

- Add ability to re-open all tossed tabs from extension settings
- Ensure first-run page selects existing setting if reopened

No user-facing changes. Corrections in variable scope and potential silent async failures.

Firefox for Android does not give tabs a default title if the page is missing one (such as about:blank). This update accommodates for the difference in behavior.

Fixed bug in setup for Firefox for Android