MDL-37566 AJAX Fix issues with minimum height and centring

Conflicts:
	lib/yui/chooserdialogue/chooserdialogue.js
MDL-37645 cache: fixed issue deleting mongo instance
Automatically generated installer lang files
Merge branch 'install_24_STABLE' of git://git.moodle.cz/moodle-install into MOODLE_24_STABLE
weekly release 2.4.1+