New tabs opened from pinned tabs should open at the end of the tab bar

[Vincent]

When opening a link in a new tab (e.g. through middle-clicking), the new tab generally opens next to the tab that contained the link, which is useful to keep it close to related tabs.

However, when the tab containing the link is a pinned tab, this is less useful, since the opener is usually a long-running app like email (so the opened link isn't necessarily related), and the pinned tabs are stuck to the start of the tab bar, so the new tab gets opened all the way at the start as well, far away from the tabs you're currently working with.

It also means that the Alt+<nr> keyboard shortcuts, to quickly switch to tabs at the start of the tab bar, will suddenly point to the newly-opened tabs, instead of the more static tabs-that-have-been-open-for-a-long-time.

This gets more noticeable when using vertical tabs, where you'll generally have more tabs open, and the rest of your tabs get scrolled out of view.

(The Pinned Tabs Fix extension is an attempt at implementing this, though it's limited in what it can do by virtue of being an extension.)

[Jon]

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