[BUGFIX] Add missing DOMready checks and streamline code

Also remove useless closures and public exposure of modules, which are not
used via the TYPO3 global.
Moreover use single quotes for 'use strict' consistently.

Resolves: #70601
Releases: master
Change-Id: If7183f91a5b9fab320cea8eb1759e78b47141984
Reviewed-on: http://review.typo3.org/43999


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>