[BUGFIX] Add missing check in PreparedStatement->execute()

When using prepared statements for inserts and updates, the
execute method currently fails due to a missing check on the
return value from $this->statement->result_metadata();

Resolves: #61229
Releases: 6.3, 6.2
Change-Id: Ida17f617915c36a0c2e91663eee64b4c358090e2
Reviewed-on: http://review.typo3.org/32457
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
[BUGFIX] Let Web-View respect TCEMAIN.previewDomain

Added previewDomain in order to have Web-View functioning in the
same way like Page-Preview does.

Change-Id: I7193cd93a2b9b2d175e162d3fab0b837aefd2487
Fixes: #61226
Related: #30889
Releases: 6.3, 6.2
Reviewed-on: http://review.typo3.org/32512
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>