Fix Page::getCollectionPathFromID
Fix Page::getCollectionPathFromID

getCollectionPathFromID should return the canonical path of a page.

This fix will fix this, by ordering by ppIsCanonical in descendant order,
so that the first row (ie the returned one) is the one with
ppIsCanonical = 1

avdevs/concrete5,MichaelMaar/concrete5,MichaelMaar/concrete5,TimDix/concrete5,avdevs/concrete5,MichaelMaar/concrete5,avdevs/concrete5,TimDix/concrete5,TimDix/concrete5,matt9mg/concrete5,matt9mg/concrete5,matt9mg/concrete5