Fix favicon disappearing in Firefox

Fix favicon disappearing in Firefox when setting location.hash
See bug #3448485
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No need to offer index maintenance if foreign key is not supported
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Merge remote-tracking branch 'origin/master'
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Corrected reference to AJAX viable
Add missing ! to return value
Removed alert that was used during debuging
Merge pull request #219 from m0hamed/bookmark-fix

[#3852] Bookmark creation is broken
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Merge remote-tracking branch 'origin/master'
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