[BUGFIX] Module recordlist: Removed call to deprecated method render()

Call of FlashMessage->render() was replaced with appropriate code if
a temporary mount point is set in DatabaseBrowser and PageLinkHandler.

Resolves: #73661
Releases: master, 7.6
Change-Id: If11b9b1a6447807ff9e567b2288c198fa0eea961
Reviewed-on: https://review.typo3.org/46884


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>