MDL-39507 Question HTML export: fix image handling.

Some code got committed to stable branches that relied on a new API that
was in master only. This fixes it to use the old API.
Merge branch 'MDL-39507_24' of git://github.com/timhunt/moodle into MOODLE_24_STABLE
Automatically generated installer lang files
MDL-41200 filepicker: change header string to select.
Add length limitation for header, so it fits nicely in mobile devices
MDL-41200 Filepicker: Reduce the string length to fit the dialog size nicely.
Merge branch 'install_24_STABLE' of git://git.moodle.org/moodle-install into MOODLE_24_STABLE
weekly release 2.4.5+