[TASK] Sort and create page wizard cleanup

* Move ExtJs code to jQuery
* Remove unused method modMenu
* Use boolean values in functions if possible

Resolves: #61451
Releases: 6.3
Change-Id: Ibf00d23112ced8744dc356dcb11c1914deb3a91a
Reviewed-on: http://review.typo3.org/32626


Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>