Consistent access#875

Bring essential extension features to Toby Web. According to its help page, the web beta does not yet include Save Session, Open All, or the open-tabs sidebar.

I’ve also noticed a sidebar issue: when I click a tab name to edit it, the tab opens instead most of the time. Please make it easier to edit the name without accidentally opening the tab.

Add a preview showing what will be imported, duplicate detection, progress for large imports, and a report identifying links that failed.