MDL-41440 event: fixed incorrect treatment of get_string as a class
Merge branch 'MDL-41366' of git://github.com/timhunt/moodle
MDL-41098 atto: Fix min-height on firefox.
MDL-41098 atto: Enable atto text editor on upgrade

TinyMCE is still the default.
Merge branch 'm26_MDL-41410_Move_Comment_To_Appropriate_Place' of https://github.com/scara/moodle
MDL-41259 when duplicate course shortname exists an exception is thrown and sync is aborted
Merge branch 'MDL-41387_master' of https://github.com/markn86/moodle
Automatically generated installer lang files
Merge branch 'MDL-41098-master-fix1' of git://github.com/damyon/moodle
MDL-29954 repository: remove dead code

Also remove repository_attach_id() which was never used and not useful.
MDL-40214 mod_assign: Fixed issue with custom scale being lost during restore.
MDL-41245 fix redirect and missing string when cannot automatically delete uninstalled plugin
MDL-35925 File picker - Improving accessibility by adding focus and removing unnecessary alt attribs
MDL-41249 assign: Fix incorrect gradingform restore step

The mapping in the previous patch was wrong - mod assign uses
the area "submissions" but the itemid is the grade->id not the submission->id.
MDL-41466 theme_formal_white: moved courses action icons once again on the right
MDL-41466 theme_formal_white: added missing ending new line
Merge branch 'w35_MDL-41245_m26_pluginuninstall' of https://github.com/skodak/moodle
MDL-41348 question code depends on filelib.

I think this used to work because mod/forum/lib.php used to be included
everywhere, and in turn included lib/formslib.php. We should declare the
dependencey explicitly.
MDL-41403 Backup: reduce memory usage when searching for courses / categories

Also makes a few existing comments in the changed code area adhere to coding standards.
MDL-36093 grade export: Fix HTML special characters printed litteraly.