Automatically generated installer lang files
MDL-47564 Availability: incorrect use of defined('PHP_UNIT')
MDL-47572 libraries: modify unittest to avoid random timing fail

Thanks to Nigel Cunningham
MDL-47583 tinymce_managefiles: correctly decode filename
MDL-47583 atto_managefiles: correctly decode filename
MDL-47594 core_accesslib: removed three useless lines of code
Automatically generated installer lang files
MDL-47431 advanced grading: correct use of frankenstyle names for consistency
MDL-44548 mod_scorm: force an external sync to check for updated files.
also remove some globals no longer needed (not used in function or in required files.
MDL-40351 course overview block: improved strings
MDL-46576 core_grades: Fix upgrade to natural weight.

When upgrading from 'Sum of grades' to natural aggregation the
weights were no automatically assigned and the grade totals were
wrong. This has now been rectified.
Merge branch 'wip-MDL-46576-master-upgrade-fix' of https://github.com/abgreeve/moodle
MDL-47613 wiki: allow searching several words

Thanks to Sandeep B for suggested solution
MDL-43089 quiz editing: don't pop up qbank on initial page load.
Merge branch 'install_master' of https://git.in.moodle.com/amosbot/moodle-install
NOBUG: Fixed SVG browser compatibility
NOBUG: Fixed file access permissions
Moodle release 2.8beta

jabber bot fighting edition.
MDL-47603 quiz edit: qbank popup preview icon needs new window

Also, ensure that clicking the + icon adds the question on the right
page.

Bit of this fix are a bit hacky, but we have to deal with the fact there
is not a good general solution to MDL-47604.
MDL-47631 report_participation: fixed filtering by letter