[BUGFIX] Do not overwrite page title of USER plugins

Re-inject the correct page title gathered from a cached page into the
TypoScriptFrontendController, such that when writing the page title
again to the PageRenderer the original value is not overwritten.

Releases: master, 6.2
Resolves: #62080
Change-Id: Iceb602ff7db9a4679eeb9ce6e2295790f71215f8
Reviewed-on: http://review.typo3.org/37938


Reviewed-by: Georg Schönweger <georg.schoenweger@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <andreas.fernandez@aspedia.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>