James Teh 14367430eb Bug 468497: Inform the accessibility FocusManager when a XUL tree's view changes. r=MarcoZ
Without this, accessibility clients don't get notified about the newly focused item.
For example, this meant that nothing was reported by screen readers when switching tabs in Thunderbird with control+tab.

MozReview-Commit-ID: F7vqvLXzeJR

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extra : rebase_source : debd649415cdc7417660c5846a923a5cc8edad79
2018-07-05 16:33:24 +10:00
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