[!!!][TASK] Remove ElementBrowser::getMsgBox

[!!!][TASK] Remove ElementBrowser::getMsgBox

Messages should be rendered by FlashMessages and not by html tables.
Drop the whole method and change the usages to proper API.

Change-Id: I927c5042fe6179c44c597d1d185d683727ff506b
Resolves: #68571
Releases: master
Reviewed-on: http://review.typo3.org/42007
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>