[BUGFIX] Fix invalid URL in EditDocumentController

The form action generated in EditDocumentController now properly
resolves ? and & characters clashing together.

Releases: master
Resolves: #66382
Change-Id: I038e2179229cbe3a65dbc1731fd6db789c2d10f9
Reviewed-on: http://review.typo3.org/38638


Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>