Set canonical URL to root when on start page

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as discussed in 22db8df7

Sometime the passed AUTH was not correct. This is a quick fix,
but the whole media manager handling is one stining pile of crap that
needs a major rewrite.

  update jquery and jquery-ui

Issue #740 quick simple fix

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Removed creation of <meta name="date" as suggested in issue #740 thread

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the triggered event did not allow event handlers to change the passed
data

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not encode semicolon in idfilter()

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Restores vanished changes of #84

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